Hello Aspirant

it's truly depend on your interest . However both are good choices if u have ample of time I would suggest you to learn both. Inorder to know the  career opportunities and the timeline of learning go through the details mentioned

For larger organizations and businesses, Web development teams can consist of hundreds of people ( Web developers (https://en.wikipedia.org/wiki/Web_developer) ) and follow standard methods like Agile methodologies (https://en.wikipedia.org/wiki/Agile_software_development) while developing Web sites. Smaller organizations may only require a single permanent or contracting developer, or secondary assignment to related job positions such as a graphic designer (https://en.wikipedia.org/wiki/Graphic_designer) or information systems (https://en.wikipedia.org/wiki/Information_systems) technician. Web development may be a collaborative effort between departments rather than the domain of a designated department. There are three kinds of Web developer specialization: front-end developer (https://en.wikipedia.org/wiki/Front-end_Web_development) , back-end developer, and full-stack developer (https://en.wikipedia.org/wiki/Full-stack_developer) . Front-end developers are responsible for behavior and visuals that run in the user browser, while back-end developers deal with the servers.

For a beginner, who does not have any knowledge about Java or Kotlin, it may take around 3-4 months to learn the concepts of the language. After learning the core language, you move onto learning Android development, which would take approximately 6 months – 1 year depending upon how much time you devote per day. According to a study, over 135 thousand new job opportunities in Android app development will be available by 2024. Since Android is on the rise and almost every industry in India uses Android apps, it is a great career choice for 2021.

Hope this information helps you.

GOOD LUCK!!

Hello,

I hope you are doing fine, You should learn both if you're aiming for a better career. It would increase your chances of getting a job dramatically.
Most organization hire because of cognitive versatility - in simple words, how comfortable you are with learning different technologies.

Now, which one to go first?
Do you know Java and have some OOP programming experience? Go for Android first.

Are you a newbie?
Go for web development. Start with HTML and move to CSS and JS(The most popular language currently). There are TONS of resources available on the internet itself to learn all these.

I hope you find this information helpful. I wish you all the best for your future.

Good Luck