I have just bought marigolds, gerbera daisies, petunias, asiatic lillies, rose bushes, strawberry plants, and a tomato plant.
But any who, could any garden expert give me tips on gardening, and warnings and what not?
Prepare the soil well. Add some Coast of Maine Compost or sphagnum peat moss, and maybe some gypsum if you soil is clay.
Tun the soil over to abut 1' depth with a spading fork after you spread your soil additives.
Rake in a little organic fertilizer, plant, and mulch with what you can get locally.
About 2" of mulch should be plenty.
I suggest finding some basic gardening books you like the looks of and reading them. If you're short on funds, try the library or thrift stores, which are an abundant source of cheap books.
I specifically suggest as a beginner you do some of your reading on companion planting, some plants like each other and some plants don't. Some plants have beneficial effects for other plants. For instance, you'll want to put your marigolds near your tomato, as marigolds exude something that nematodes (microscopic worms that are a scourge of tomato plants) don't like. Other plants, like the onion family, are disliked by many other plants and plants planted near or with onions will often do poorly.
Also, if you plant to plant them in the ground, it will be helpful for you to read up on building your soil with compost, mulching the top of the soil, pest protection. Asiatic lily's are especially attractive to gophers, so I'd keep those in a pot, although if you have gophers, they'll eat almost anything if they're really hungry.
If you plant to keep your garden in pots, which is not a bad idea for a beginner, read up on container gardening. It's basic but knowing that black plastic pots can absorb enough direct sun on a hot day to effectively cook and kill a plant, and that you'll want a loose soil that retains water are among necessary tips you'll get in a container gardening book.
I'm in California, and for me the Sunset Western Garden Book is a bible. It's specifically written for the western states, if you are outside that area I'm sure Sunset has a publication that covers your area. Use it and read it and explore it, it will have pretty much everything you will need to know, although if you are really interested in gardening there are lots of other wonderful books as well.
Above all, don't be afraid to try new things, to learn from your mistakes and don't give up if something dies or fails, you can always start again. Have fun!
Oh, and a wonderful way to learn about gardening as well as gourmet cooking is to have some potted herbs. Herbs started a lifelong interest for me in gardening and also in cooking! Even if you don't have the room or inclination ro grow your own food, growing your own herbs to use as seasoning is very rewarding. Basic herbs you'll want to start would be rosemary, oregano, tarragon, thyme. Those are all perennials, meaning they live through the year. Your annual herbs would be basil and chive. There are lots more, be sure to taste a leaf of the plant before you buy, I find some oregano and marjorams much more tasty than others. As 4" pottted herbs will take a while to get to where you can regularly take cuttings, you might want to start with a larger plant. I won't usually take cuttings from any herbs til they've been in my garden getting overhead water for a couple of months, that way I know any junk on them from the growers has washed off.
1.Make sure not to over water.
There are a ton of plants that hate sitting in water and too much will kill them faster than anything.
2.Check for bugs daily!
There are little beatles that love to munch on the petals of flowers. Get a cup filled with water and soap and pull off any of these you might see
3. For indoor plants get afed poisoning!
Afeds will kill off any indoor plant before they even begin to bloom. Get the poison and sprinkle over the dirt and any leaves. As soon as these little white bugs land they will die.
4.Be patient.
Especially with bulb plants - they won't grow much the first year you plant them. DON'T touch them and I promise that next year you will have TONS of beautiful flowers.
5. Tomatoes need tons of light! TONS!
Make sure they are always in the sunniest area possible. The sunnier the area the better tasting the fruit.
6. Don't use tons of chemicals.
7. Make sure to prune your rose bush. I would get a book on roses as some can be super temper mental!