How to Build a SaaS Startup as a Beginner ? Can Anyone Share some framework of Success ?

Yes this - also interested!

There isn't any specific or general way of building a startup and making it successful. Finding your own path is probably the most interesting and yet the most challenging thing about startups. There are a few YouTube channels which cover a lot of topics regarding building a company/startup (e.g. Slidebean). BTW we are preparing to launch series of interviews with founders, where we will cover some topics that could be interesting for you. You can subscribe to our mailing list and find out as soon as we launch these series! (web: www.reskript.com)

I'd suggest you follow TK Unstoppable on Youtube. He has the best SaaS startups advice and strategies