How can I learn meditation or mindfulness at home?

There really is nothing to it. The actual point that one must remember is that ' you cannot be wrong'. Mindfulness is a general term about simply being more mindful of experiences. Meditation can help you become more mindful by training you to calm your mind. Try to go online and get the most basic instructions on mindfulness and meditation. The more basic, the better and start working from there. I repeat, YOU CANNOT GET IT WRONG

There's plenty of online resources for that exact reason! Let me know if you need any links, I'd be glad to do some research for you and find some.

Tbh I havent done this yet so I cant really say much. But I guess heres a little thing you can do, which I did do: close your eyes, sit down and just listen to your surroundings. It helps

By this, you sound like you are having something going around your mind for awhile now. Would you like to share that with me so we can both find out what method would best fit you?

You can make sure your surroundings are peace and quiet sit on the floor and stretch. Breath and let go

You can find tons of usefull recourses online. On this very site even! For me yoga works, but it might not work for you. Try out different things, maybe even step outside of your own comfortzone. You might discover something amazing! If yoga is something that you are interested in I recommend doing some Youtube searching. There are a lot of interesting channels about how you can get started with yoga and meditation. I know yoga right now is mostly seen as a kinds of fitness (which it is ofcourse) but don't forget the spiritual side of it.

I took yoga classes for 4 years ( I live In India btw) but the world we live in today, it is just as easy to learn it online. Find a quiet room or open space and practice breathing exercises. After that you can try new poses like vajra asana. Meditation is essentially an internal thing- you trying to connect with your inner self and it can be achieved with sheer dedication and determination.

My meditation comes best to me in the shower or taking a bath. I am to let my mind relax and go to a peaceful place.

Write your feelings/thoughts down on a piece of paper & then, rip/burn the paper after you're done.

I've recently started looking into this myself on pinterest, youtube, and for podcasts. I've tried doing something a little bit every day. Having a clean place that is organized is a big thing. Extra clutter doesn't help. I've also thought about having a space that smells good. Try looking on pinterest, youtube, and maybe for some guided podcasts.