Armor will be more important than leather, and being nice and cool when it's hot out will help a lot. So go with a well ventilated, armored textile jacket. Textile will protect more than mesh, IMO mesh is reserved for really hot days where you'll be riding in a relatively safe and calm environment. GP style armor is the best, failing that get at least CE approved armor and a good quality back protector (some jackets come with a cheap, insufficient back pad which is a usually a glorified piece of foam).

Instead of dedicated riding pants you might want to look into something like Icon field armor.

But don't skimp on the gloves and boots, in a collision those will be especially important. Use heavy, armored, leather gloves and dedicated motorcycle boots.

Also you will really want a full face helmet.