Welcome!
Someone already said this, but it depends on what you mean by proficient. I could probably get a CCS without nicking myself within a month or 2. But I really like a smooth shave, so I shoot for at least a DFS, which makes me feel not proficient at all after 6 months - it typically take me 20-30 minutes from the time I splash water on my face to the time I wipe down the counter, and I still nearly always give myself at least a weeper or 2.1. How long do you think it took before you became proficient?
Still working on it. Your strategy of changing things slowly is a good one.2. How long did it take you to figure out which combinations of razor/blade/prep product worked best?
I like the advice above about waiting to get consistent results with what you have.3. How long should a newbie wait before experimenting with new razors?
I didn't use a soap or brush until a month ago. I used the same canned gel as I did with carts, then VDH, then Cremo, but was getting frustrated still getting weepers all the time and was convinced to try a brush. I've gotten some better results, but I think it's more a slowly improving technique than anything to do with prep products. Jury's still out on that one. (I do kinda like the brush though tbh, and it didn't add any time to the shave.)I don't use soap or a brush. The Shave Secret oil works really well for me. Maybe I will try some other products after I am sure I have solid technique.