Advice on giving equity to investors

Hey everyone, Me and two other friends have started working on a startup and we are now looking into funding and accelerators. One thing we will have to do is give away equity and being first-timers, we would like to get as much help and information as possible about how to approach this correctly.

Although new, we are not unprepared and have documented ourselves extensively via both reading up practically every famous startup book, Y Combinator posts and we attend local entrepreneurs meetups. However, we feel like we still need some more advice and other entrepreneurs' stories to weigh how to approach this.

Hence we would really like to hear your stories, opinions, and advice on how first-time entrepreneurs should approach investors and how much equity to give them. Thanks in advance.