is too late to start acting?Watch
I agree with above - go to acting classes and get some experience. Try different types of roles, different emotions, things that challenge you as an actor. It's also important you stay informed about what's happening on the film, theatre and music circuits - watch films and plays, study what your favourite actors have done in their best performances (and how they prepared for it), and practise your skills wherever possible. Rehearsal is the best preparation you can do. People make short films, put them on YouTube and social media etc etc. I'd also recommend you have a stable source of income as performing arts isn't something you can do full-time when you're inexperienced. I perform for stage and screen and the most I've ever done is about 3 weeks in a year on films and 2 weeks on stage. Some gigs pay very little and some take ages to pay - it's not secure work.
Having said that, living in London will be an advantage for you. The best opportunities and the most work is all inside the M25.