As an Indian, you probably speak another language at home which is your native language. This can have a lot of similarities with Hindi which makes it easy to learn the language. You can find a lot of common words in your native language and Hind like the days of the week. Many Indian languages have similar words for the days of the week. This helps you build a good vocabulary based on things that you already know. Though we have words for good morning or good afternoon in Hindi most people either use the English words as they are or can use a word like Namaste which can be used to greet someone at any time of the day and even while meeting or parting. You can find many such words that help you during the initial days of learning.
When it comes to grammar, if you already speak a regional language, it is possible that you can find some similarities and thus learn Hindi easily as it becomes more relatable. For example, unlike English where the Subject Verb Object order is followed in sentences, most Indian languages including Hindi follow a Subject Object Verb pattern.
Bollywood movies are not just super entertaining, but can also be used as a tool to learn Hindi. You can pick up a lot of vocabulary from them. Basic sentence construction can also be understood. Equally beautiful are the Hindi songs to listen to. You can find soothing to peppy numbers according to your mood and use them to learn a lot of Hindi.
Start conversing with your Hindi-speaking friends with whatever you know. Yes, in every possibility people may laugh at you or mock you, but they would still help you learn the language. If you have learned Hindi as a part of the curriculum in school but could never get beyond reading and writing you can use that for improving your communication in the language because you are already familiar with the language.
You can also join an online class like Multibhashi that allows you to learn Hindi either through English or one of the major regional languages of India. The classes are fun and can be taken from the comfort of your own space at your convenient time. The best part is you get to learn exactly what you need and at your own pace.