Great market for a first timer. My advice would be as follows...
Buy second hand as you get some amazing bargains, but buy from a reputable seller in here as they will have looked after their kit.
Do your research, read the manual and watch some tech videos on YouTube to see if you think are capable of looking after it and maintaining it (although they require little, just a clean and lube of the bolt after a day's play)
If you can try before you buy, go to your local site and see what people shoot, try their guns out and see what 'feels' best for you.
Pick a budget and stick to it. Many new guys buy really expensive guns and gear and leave no money to actually play the game with. Paintball is an expensive hobby do make sure you have finance to buy paint and actually get to use your gun.
No question is a stupid question as its better asking first then doing something stupid and getting stuck with the consequences.