Remember: don't should all over yourself!
If you don't get it, it's a play on the phrase "don't shit all over yourself", meaning don't beat yourself up. In this case, the idea is don't make a bunch of "should" statements about yourself or your plans because usually phrasing things that way just leads to demotivation and being frozen from feeling overwhelmed.
Instead, try to realistically prioritize and use other words that convey urgency (for the tasks that are truly urgent) but also make you feel ready to take on those tasks. For example:
Antea wrote:I have to go back to Armenian, because for two weeks now I have had a lot of work and I couldn’t do anything. I should continue with Georgian, because if not, I am going to forget everything I have learned until now. And I also have to something to improve my Hebrew vocabulary. And of course, I should do some Persian homework and try to write a formal essay in Arabic just to push my level forward.
Out of the five languages you mentioned (all of which you've written as " should" and "have to", making them all the highest priority!), I believe only Armenian and Georgian are at beginner levels, while Hebrew and Persian are probably at intermediate levels and I'm going to assume Arabic is at an advanced level if you're talking about writing a formal essay in it. So, then, I would probably consider Armenian and Georgian as having the highest priority, since you haven't been able to do anything for two weeks for them. I would start with those two and phrase it like this: I need to study some Armenian and Georgian because, for the last two weeks, I have had a lot of work and I wasn't able to do any language studies.
Next, it seems to me that the other 3 tasks are more "wants" than "needs". You would like to do something for Hebrew to improve your vocabulary, but it doesn't
have to be right away since your Hebrew will more or less stay at the same level while you're focusing on your beginner languages. (You could also listen to things in Hebrew for when you need a break from Armenian and Georgian). The same is probably true for Persian, unless by homework you mean some work assigned to you by a teacher for a regular class. If it really matters whether you do the homework or not, then put the Persian homework as either highest priority, over Armenian and Georgian, or the same level as your beginner languages. If, however, it's work assigned by something like an italki teacher, chances are they'll be ok with you taking a little time, in which case I would either put the homework on the same priority level as Armenian and and Georgian, or just below it.
Lastly, the formal essay in Arabic, while definitely an ambitious task that sounds like a great way to improve your MSA writing skills, is probably the lowest priority right now as you're trying to get back into language studies. Again, though, it does depend on your reason for doing the essay. If it's just something you're doing to try and push yourself, then keep the idea on the back burner (if you don't know this expression, let me know and I can explain it). Then, once you've gotten back into some Armenian and Georgian, and perhaps finished your Persian homework as well as done a little study to improve your Hebrew vocabulary, start writing that formal essay.
Of couse, this is all meant to exemplify how to not "should' on yourself, but instead break things up and reword things to make them more manageable. I hope this helps.