Here's the sentence with all the errors in bold:
There are many indoor hobbies you can try. they can be active, such as squash, or something you can do sitting down, like painting? Interested? Pick a Hobby that suits you and see how far you can take it Good luck!
And here's the fixed sentence:
There are many indoor hobbies you can try. They can be active, such as squash, or something you can do sitting down, like painting. Interested? Pick a hobby that suits you and see how far you can take it. Good luck!