I think your only issue might be the length, unless you get a lot of pow where you are. But you did say you ride groomers. The main issue with old boards is they lose there pop and flex like a wet noodle, so if you like spending time in the air it's just more work to get there. Dont worry about the scratches and dings on the top, thats pretty much cosmetic. I don't think you absolutely need to get different gear, at least go out for a day or two and see if you can deal. You might be happier on a shorter board, but sometimes the cost of stuff has to make the decision for you. If anything just keep an eye out for a cheap board that's a better size for you, or save up and buy something later in the season when it gets cheaper.
My first board was a relic too but I still had fun despite the sub par gear.