I need a professional ROBLOX GAME development

Hello developers. I was wondering if you were able to make my game a little bit better? I started off in Roblox studio with a template, mansion of wonders but I have some great ideas to expand off it and make it into an amazing game, I just don’t know how and that’s why I’m asking for help. I want to keep the gun concept, but expand on it, the template gave you a single gun but I would like to see an inventory system so you can look at all the guns, and of course add different kinds of guns. contact me for all my ideas!