wallet help

Hey guys, so basically I am not the most savviest tech person and have always used Robinhood to buy and store my bitcoin because it’s so easy to do. I have been reading a lot more into it and on Reddit and see a lot of people rec ones to put it in a wallet or something like that. Is there any suggestions anyone has or a tutorial I can get on how to move it over. I know it’s bad to have it in Robinhood as I’ve seen all the comments I’m just not sure why. Any advice helps guys thanks!!