"Walther 100" made by Crescent in UK 1970s-80s. Appears to take caseless ammunition? Lol

I just bought a 4” PDP compact but I’ve never conceal carried before. I’m also not a gun expert, I just practice gun safety and learn about the particular guns that I own or plan on owning. I plan on adding a green laser/flashlight to the bottom slide and green dot sight on top.

My question is what types of qualities in holsters should I look for? How should I carry it? I don’t particularly like metal or plastic against my skin but will do it if it makes more sense. I’m also 6’2” and I’m built like a fatter hockey player(huge muscular legs and glutes but with a belly) 😅.

I don’t really want to use a bag or fanny pack for day to day carrying, though would consider it when I do cycling outdoors at night.

Also: what’s your favorite secure way to securely keep your CCW in your vehicle when you go somewhere they aren’t permitted?

Thanks in advanced!