Depends on which Arabic. If it's colloquial, spoken, no harder than most languages, I guess. Could probably master basics within a few weeks if persistent and using good tools. If it's Modern Standard with grammar, probably a fair bit longer, depending on which languages you already know. Arabic works very differently from English, for example, but is close to Hebrew. If you want to learn the classical language, years, probably.

You could probably learn a few phrases in a couple of days but language is usually a complex thing that takes years to master. I still get my English language wrong and I'm a native Brit.

Learn the alphabet and YouTube. I taught myself how to read but I don’t bother writing. It’s not easy. I speak it so that helped.

Apparently not long. When I lived in Morocco I knew people with kids and the kids were speaking some Arabic pretty good by the time they were a year old. ;-)

Fam m trynna learn hmu

I'm not sure. Arabic sounds to be a bit complex because like Hebrew, there aren't really vowels in the alphabet. So learning the alphabet I think would be the tricky part.