It's hard to say how you should learn Hindi. You should focus on the pronunciation and try to understand how the sentence forms.I know Hindi. If you need help I will help you.

For the alphabet, see if you find the Devanagari script tutor helpful - https://www.hindibhasha.com/hindiscripttutor.htm

A question for native Hindi speakers: Would you prefer people to call Devanagari an abugida rather than an alphabet?

I would recommend just writing it out, like say simple sentences if you access to such, even if it sounds boring and is initially very tedious. Most likely, you will get a hang of it in a few days and be able to look at building higher skills up on it soon enough

Write it over and over until you know it inside out