I wrote about this a few years back on my personal thread. Have a look if you’re interested and have the time. I didn’t feel comfortable copy-pasting the whole lot here.
Regarding being present in the moment. Yep, it’s easy to slip into overanalysing. You get worried if you’re “doing this right”. It’s introspection, you are focussed on yourself instead of your surroundings. That’s needed too sometimes. When I need to ground myself, I can try to narrate what it I see. “That cloud has a funny shape. Casts a long shade.” Another way is I try to do is making a gratitude list. “I’m grateful for this rain. Plants really need it. I’m grateful for my husband snoring. He is here next to me.” Oh, putting the phone/whatever screen away helps immensely. Doing something with my hands, like crafting.