[@Sebastian] i use remove.bg- it's a godsend 

[img]https://i.imgur.com/797Hnq5.png[/img]

you can also use lunapic's transparent background funcionality if you want the original quality to stay the same, though it doesn't work as well as remove.bg

finally, i make most of my things in photopea.com (free, browser-based photoshop and it's almost the same feature by feature except for some gif making/animation functionalities or so I've been told) & the creator of the website has written a guide on background removal as well

https://www.photopea.com/tuts/remove-background-from-photo/