As said above, a decent budget multi-effect is a good place to start. Especially if you can borrow (as in your case).
As also said, decent budget individual pedals are available. Watch out for the 'boutique' pedals, going down that road can get expensive.
Also think about how you will power the pedals...... you don't want to lose power due to a flat battery. And batteries can be expensive too. Many use a mains power pack to run their pedals. I use a rechargable battery pack to avoid mains leads on stage.
Not exactly an effect, but you may wonder about using compression. In this case you may find a lot of heated debate about it on on-line forums 😉.