Busy moment!

This year is being has been very tough for me. I´m studying at university and at the same time, I´m working so that I don´t have much free time. They say it´s good to be occupied busy (even more so these days in these times -I don´t know if I can say "in these times") but I have the feeling that as the weeks pass by and I don´t do am not doing anything but working and studying. and When the weekend arrives I am so tired that I don't want to do anything. is here I´m really tired. I know that it´s going to be like this for some several more months, but I hate being in a rush all day! (I took the liberty of dividing one of your sentences into two as it was getting to be too long.  I also added a bit on to the second sentence which I hope conveys what you wanted to say)

I´m new in the teaching world so I spend a lot of time thinking about*1 ideas for my classes. I get very frustated sometimes because I don´t want to teach the way I learned English in school. but However, when you run out of ideas, you tend to do what you are used to although I´m trying not to. do that though*2! hehehe!

*1: Is there any difference between "think of " and "think about"? (not really, they both mean the same thing.  Sometimes it really just boils down to what sounds better in a certain situation or context.  This comes with experience and practice) 

*2: When I hear people saying "though" I understand the meaning. However, it´s hard for me to use it when I speak... Can anyone give me some examples?
("though" and "although" can often be interchanged as they mean about the same thing. "Although" tends to always be used before a phrase whereas "though" is more flexible and can be used anywhere in a phrase or sentence if it sounds right.  Again a lot of this comes with practice and the context in which they are being used)
Thank you!

Congratulations because your English is excellent! I have only made some very minor corrections and changes to make it sound as if it was written by a native English speaker.  Your written fluency is very high and it will not take you very long to completely master the language as long as you continue to practice.

I am not a teacher or an English grammar expert so I hope that my words of advice are of some help to you.