Personally, i think your best move is to clean the playfield a bit, change the rubbers if needed, and just enjoy it for a while.

This is just my opinion, so please take it with a grain of salt. But as soon as you start adding mods and LEDs etc, you're introducing a chance at accidentally messing something up in the process. The helpful folks here will help you get back on track, for sure--but there are few feelings worse than doing a little upgrade or maintenance and turning the game on afterward to be greeted by an error message, blown fuse, or otherwise non-working game.

In my experience, something will inevitably break or need adjustment sooner or later. Perhaps just enjoy the glow of new pinball ownership for a while before getting too ambitious making upgrades etc.

Of course, i love working on my games and have no problem letting them sit for weeks or even months while i fix them...but I've got plenty of other pins to play in the meantime

Whatever you decide to do, i wish you the best of luck moving forward. It's a wonderful hobby with some really awesome folks--enjoy!