Snap! has an installable PWA option, which makes a desktop app that works offline without internet connection and still lets you access (almost) all assets and resources, such as costumes, backgrounds, sounds and libraries when offline. I had to disable this for a short time earlier this Fall when a new Chrome version broke it, but it's long been resolved.
I dont think it is allowed to steal turbowarp's logo (and possibly scratch's costumes, as seen in the logo, but i'm not sure about that).
please don't mention that, for your own good (ツ)
you can edit your posts after some activity on the forum, because after you have some activity on the forum, your trust level increases. there are only 2 trust levels that people who are not moderators have, so after it increases once, it wont again.
Also, welcome to the forum!
a few tips:
I would recommend creating a pfp (profile picture)
try testing out and playing with the libraries, especially the catch and throw blocks in the ITERATION, COMPOSITION library, check out the help screens for them too by right-clicking the block. (file icon > libraries)