Welcome aboard,
@bruno3136!
Don't hesitate to check out the DIY
threads. ALLLLLLLL kinds of great advice. Read the
threads and blogs by
@Hoosier and
@dannyv45. They offer excellent advice for folks just getting started. You can certainly get overwhelmed, or you can keep it incredibly simple.
Bear in mind, posted recipes should be thought of merely as guidelines. YOU might need a little more of this or a little less of that in YOUR variation. Start with smaller batches at first, until you find combinations that work for YOU.
Each flavor manufacturer might have the same "name" of a flavoring, but they might be of different concentrations or even taste slightly differently than other manufacturers. Personally, I am comfortable swapping Capella (CAP) flavorings virtually 1 for 1 with The Flavoring Apprentice (TFA) flavorings. I can't say the same for direct substitutions of other manufacturers. What I might normally use 10% of one particular flavor, another brand (or your specific tastebuds) may only need 2%