Steve W is right to some extent
You would be better off using an Android box, but make sure you get one that has at least 2GB Rom and 16GB Ram
I currently use a Tanix 2 box with the above, purchased from "Gearbest", which do not charge for postage. "Amazon" sell them as well. You can buy them at prices between 20-70 Euros. Personally I would not buy one that costs too much, because technology is advancing so rapidly that the box soon becomes out of date. I think we are now up to 7.1 +, whereas mine is only around 6 months old, yet is a 6.1 and was only approx 25 Euros.
Check out Google for reviews, on android boxes
As to Mobdro, it plays absolutely fine on mine, but there is also a build called "terrarium", which has received good reviews. Google again
Also there is a site on f/b "Kodi uk.tv general support & community group", that you can join. If you have a problem, ask them and someone will always help. I recently spent over 2 hrs with someone on there, that walked a novice like me, through a procedure.