Great to see fellow countrymen here! Greetings from Jodhpur, Ritwik.
Have never used Bubble - so don’t have much to say about that.
Just wanted to extend a warm welcome!
Suggest to avoid services like backendless, go for Postgres or MySQL directly - self hosted instances on DigitalOcean are not too expensive and very easy to setup. Your data is not locked in at all with any provider.
Setting up hosting is pretty simple. You can setup your own PaaS (ref here: Roll your own PaaS - Heroku alternative (Part 1)) on any VPS like DigitalOcean, Linode, etc. - both these have India servers - good for small latency if your clients are based here.
Or get yourself managed reseller account or managed VPS with cPanel (much more expensive but it is easy to manage stuff with cPanel) with providers like chemicloud.com or fastcomet.com.
With all due modesty, am a CA by education, if I can do this - believe me, anyone can!