I'm a big guy. I want to build up my chest and my arms, to get them big n muscular , whats a good way to start out and a good workout routine?

I got a bench , a couple dumbbells(8's , 20's , 25's) , a curl bar , and some sorta pull up bar attached to weights thing. So whats a good workout for a beginner? And Also is it better to start off with big weights , or small weights and more repetitions? And Please Be As Specific As Possible.