Hi guys

This is the first map I've drawn in about 10 years, and it's the first one I make digitally, so I'd really appreciate critique and advice!

Click image for larger version. 

Name:	mappa base 1.png 
Views:	43 
Size:	1.34 MB 
ID:	104479

Plus, I'm struggling with creating realistic climates and biomes, so a little help with that would be really appreciated

these are the winds (the map pictures the northern emisphere only):

Click image for larger version. 

Name:	mappa venti.png 
Views:	37 
Size:	1.34 MB 
ID:	104480

I've started coloring a few biomes following the Köppen climate classification, but I really don't know where to begin:

Click image for larger version. 

Name:	mappa biomi prova.png 
Views:	38 
Size:	1.68 MB 
ID:	104481

I've read a few tutorials on biomes in worldbuilding, but they all seem a little too theoretical and don't show how to actually decide what climate a precise area should have based on position and mountain coverage

All critique and advice is much welcome! Thanks