Good suggestions of going out on a steady horse first with company. Is your horse used to trails? Would it be ok with everything they might encounter? Here I see people running, dogs off leash, people pushing baby strollers, bikes, dirtbikes, bridges, deer running through the bush, bears darting across the trails. I have been walking my 3 year old in trails now for a very long time nothing bothers him now so hoping he will be a good trail horse. Whatever you do do not go alone for the first while until you feel comfortable. English saddle will be fine, but if you could borrow a western from someone just for trails I would.