If you aren't sure about doing an in-barn lease, maybe try another option. I personally don't think you should just go ahead and lease a horse. It is more or less the same responsibility as owning a horse, and you'd be in charge of it's care for whatever the lease says (full lease, partial lease). If you aren't sure what you are doing yet, then I don't think you'd be able to care for a leased horse any better than you would your own horse. I think it is great that you want to get back into horses and learn as much as you can.
I would do one of two things: I would consider finding a local barn and learning more about horse care and riding. Depending on your past experience and how long it's been since you've been around horses, then possibly just take lessons for a few months. You want to make sure you can provide excellent care for the horses. Or, option two, why not advertise your land as a boarding option? Obviously, there is alot to consider with that option: liability, having other people come to your home to look after the horses, etc. But it might also be a really good way to learn about horses. I have 3x in my lifetime boarded my horses on private, home owned "barns" that only had a few horses, and in some ways I enjoyed the experience way more than a true riding facility. It is something to consider, esp if you plan on owning your own horse within a year or so. You'll need at least two horses.
I'm not saying you should def go that route, as, like I said, there is alot to consider. But it would get you back into horses at home and you could make some money on the side. It is just food for thought. There is also just riding in some lessons as frequently as you can afford/desire. (doesn't have to be once a week).
Just some ideas.
But all in all, I agree right now isn't a good idea to buy a horse. Not yet, anyway. Congrats on your new home tho! You are very lucky!
~He knows when you're happy
~He knows when you're comfortable
~And he always knows when you have carrots.