Key starting point:
-Increase land count to at least 21/22ish, though you may need to go even higher. You have some expensive mana cost cards and you are unlikely to get to them without more lands.
-Cut down to 60 cards so that you have the best chance of drawing your best cards.
-Go through your creatures and pick the 5-10 you think are the best and increase your count of those. You currently have very little consistency with 23 different creatures potentially doing 23 different things. Ensure with this note you have some creatures at mana cost 1, 2, 3 and 4 as a minimum. The bar chart shown at the top of the Details tap will give you a good idea of your mana curve. Ensure it peeks somewhere between 2 and 4.
Hope this all helps.