Keep things simple. Many make it complicated. Until you are experienced, I say avoid 19 Nor based drugs (NPP, Deca, Tren…). They are just more difficult to manage (some feel bad on these, and stuff like libido and ED issues are commonish), and IMO most need experience with other steroids before diving in with those.
Simple to use injectables (not much for negative side effects) are Test, Primo, and Mast. The issue with the later two are hair loss and lipids, but other than that, they are very side effect friendly (most feel good on these). Test is pretty easy to use, but it does aromatize to E2 (the latter two don’t). You want E2 production in a cycle, but some have issues with E2 being too high. If that is the case, you will want to take less test, and use other compounds. If you handle test well, it is a great (it’s cheap, almost never faked, and gets results). You won’t know how well you handle test until you try it. I get no sides even at 600 mg/wk without an aromatize inhibitor.
You need a balance of classical knowledge (learning from research papers, and even from guys here who are able to explain the “why” behind their explanations), and experience. Nobody is going to be able to make a perfect cycle for you, without knowing how you handle certain steroids. I could give two guys the same basic test cycle and one will get great results with no sides, and the other may get mediocre results, look like a bloated whale, lose a bunch of hair, and get a set of tits. It’s why you wade in to find out, don’t jump in. Start with like 4-500 test a week and that is it. After 8 weeks, if all is good add in Var or Tbol (two very easy orals to use) for 4 weeks. Have Nolva (Tamofixin on hand if gyno starts, and for your PCT).
The longer you research, the more you will learn what is likely BS, and what makes sense. It takes time.