Audit is the best way to start your career if you want something long term in finance. Yes the hours suck, the work is dull yet simultaneously difficult, and clients seemingly do not know how to apply accounting standards despite all being qualified, however you get the best exposure to a variety of businesses and all aspects of finance. Its a great foundation to any future career choice you want within the remit of finance and a lot of people you deal with in industry will have cut their teeth in audit at the start of their career.
Most people do three years in audit at one of the top 10 firms just to get a big hitter name on their CV, get the experience, and then when they've qualified move into M and A, corp finance, industry or some other ares. More often than not, this is a lateral move within the firm you work via internal recruitment and secondments which is much easier to secure than coming in from the outside.
Without being rude here - audit grad schemes are MUCH easier to come by than M and A and consulting ones. Similarly, not to put down your achievements (which are great), people with just as good qualifications and extra-curriculars are ten a penny when you begin looking at the recruitment pool for the top 6 ish accounting firms.. Of my audit scheme graduate intake, almost everyone had a masters from a top university, and frankly provided you have the gift of the gab in your interview recruiters don't give a **** that you spent your time organising socials or virtue signalling in some third world country building a school.
Imho passing up the chance to begin your career at pwc is absolute madness but its your choice.