Switching up AAS mid cycle is just asking for trouble and asking for a mess of side effects that you can't control. Test esters will release into your system at a different rates making your test levels like a yo yo which leads to sides. Randomly throw a 19nor like deca in while switching esters and you're not going to know if your sides are estrogen or progesterone/prolactin related.

Beginners need to stick with just test. Maybe an oral kickstart to a cycle. The more advanced users introduce different compound at different points of cycles for different effects. For examply introducing Mast late in a cycle is usually to harden up pre contest, same with winny, or halo in rare cases.

Anything you want to do with AAS can be done on just test. Bulk, cut, increased endurance, its all about the training, diet and rest.

Later on compounds can be added when you're no longer growing from test after a couple cycles.

But for the beginner I'd recommend sticking with one long ester test (enanthate, undeconate, cypionate) for 10-12 weeks

Hope this clarifies