There are some real disadvantages from climbing up so high. It doesn't do you a whole lot of good to get up 25' or higher if you can not practice shooting from that height. Shooting down hill, your sight pins will be different, your arrow will fly flatter, your vital area and angle to the vitals will be different and the higher you climb the more tree sway you could encounter from the wind. Air currents can be more severe in the tops of trees then on the ground and it can be really hard to see during early season and every shot you take or get, you've added 25' of distance between you and your target. Even a 5 yard shot is "far" away. Part of the fun and challenge of bow hunting is getting close and being sneaky enough to get to full draw. You do not want to kill everything you see, but you can still get that rush. Getting to full draw on an animal and not shooting is just as good of rush and as good of a hunting day you can get. You get you high, with out all the work and mess. lol
Another thing to think about is what type of bow sight are you going to use? Multiple pin? Single fixed pin, single adjustable pin? Pendulum? Each of these presents different qualities that require consideration and how you plan to hunt is part of that.
From what you described, if someone said give you 1 piece of advise to make you the best rookie bow hunter you could be, that 1 thing I'd tell you is get a Predator IV pendulum sight. It would take me 10 pages to tell you why and compare all the different sights. It's the 1 reason I was able to take 6 deer my 1st year with 7 shots. The 7th wasn't the sights fault.
Trying to make this short. The pendulum has only 1 pin. The pendulum automatically adjusts that pin to dead on from 0 out to 35-45 yards depending on your arrow speed. It also adjusts for your shot angle automatically so the 1 pin is still dead on shooting from the ground or anywhere from ground up to 30' high. All you need to know is if your target is within your max range (35-45 yards) After that, there's no need for a $400 computerized range finder, don't need to know how high off the ground you are, you don't need to decide what pin to put on your target, no yardage markers on the ground, forget all that and concentrate on the shot. To set this sight up, you have to do some climbing. It forces you to shoot from up high, 15 feet recommended for set up. (My garage roof is perfect.) This also prevents a rookie from making his first tree stand shooting at deer instead of targets. If you follow the directions, and spend the summer shooting from every range and height you can, you will build the confidence to hunt and shoot from any stand any place, any time. Hunting ridges and slopes made easy. When you are confident in yourself and equipment, then you'll know when you are ready to hunt.
While you are shooting from the roof or 15' tall stand, get a 3d deer to shoot at (with broad heads). Shoot to find the vitals and learn the angles to them. You'll be able to hit a 1" sticker dot from about anywhere, the next step, which is harder, is to hit the heart and lungs, without hitting heavy bones first. A big difference than hunting with a rifle or slug gun. Stay off that shoulder. To be ready for next season, you've got a lot of work ahead. Break in the new bow, a couple hundred shots, get it re tuned up, sighted in. You'll need a consistent supply of arrows and a way to refletch them consistently as needed. If you're going to use the Predator IV, you'll need to know what speed your arrows are flying at, and you need to know and practice with your choice of broad head. I only use field tips at the bow shop and local range because they make me. 99% Of my shooting is with broad heads. You don't have much time and there's always something that goes wrong. Knots loosen, peeps move, I dropped a new bow from my tree stand, ect.. Come July you wont be able to practice in below freezing temps, and dressed like a mummy. Welcome to the sickness. lol
American by birth, hunter by choice.