Found a Mongoose Ledge 2.1 at Goodwill.

Hey all,

I just picked up a Mongoose Ledge 2.1 from Goodwill and I’m trying to fix it up so I can start riding this summer.

I’m pretty new to working on bikes. Right now the chain doesn’t seem right (loose / not sitting right), and I’m not sure if it just needs to be adjusted or replaced.

I’ve been watching some YouTube videos, but I figured I’d ask here too.

How do I know if the chain is bad vs just needs tightening?

Is this something a beginner can fix at home?

Anything else I should check before I start riding it?

Trying to save money and also get more active, so I’d love to learn how to do this myself.

Thanks in advance!