Well done for your super lesson Vlada.
The techincal things we tralked about were making sure your ams and fingers are as loose and floppy as you can make them. You only need to press your strings down hard enough so they touch the fingerboard. If yo're finding it hard to know if your arm is relaxed or not try the little exercise where you pretend to throw a large orange to me. Make sure your arm is loose and swinging.
With your bow hold, bring your fingers a little closer together so your hand can relax a little more.
We looked at John Ryan's Polka and played through all the different 2nd fingers. Your challenge is to see if you can work out the first two lines. We did 6 bars together, and the next few bars uses notes you know, so see how much you can do on your own.