Look at the different sections and you will see a "Springers, Pumpers, CO2, and Vintage" Section. Post your question there. I don't know much about other forums as I only pretty much reside here. Folk here are very nice (for the most part) and everyone is very helpful and welcoming.
Consider what you whant to do with your gun when you ask, have a budget in mind, etc. You can also try the "Search" feature. More than likely your question has already been asked and you will find a trove of information if you just search.
Welcome on board! .....and start working overtime, you will need the money.