A 60 days roadmap
You should learn android dev in 2022 because it has became very simple and optimized. this is the best time for learning android development.
So in the beginning the java is a better choice for you because kotlin is official language of android and you can only do android dev with kotlin but with Java you can do a bunch of other things which also help you to understand dsa and other things.
Hybrid Dev : The hybrid dev means that you only create a application once and you can deploy this app on both android and ios.
Native Dev : The Native dev means that you create a app which can only run at a single place like android or ios.
Hybrid dev looks fascinating but I recommend Native Dev because it has a high demand in companies nowadays.
Minimum Requirements
Ram : 4GB
SSD is must.