I think the most important thing to remember when riding is that you’re going to have less weight over the back wheel, so that’s going to affect your control over the bike especially on uneven pavement. Pays to anticipate any stops or sketchy bits of road well ahead of time. I’ve also heard of people running different tire pressures in each wheel, but i’ve never tried that myself.
you might also need to change your position- standard practice is saddle up and forward, with the nose tilted down a bit more due to the increased pressure on the front area. Not sure if this would change if you’re going for comfort specifically, but it’s definitely worth doing a few longer test runs and perhaps getting a fit if you’re able. If you’re planning on being in the bars for long hours it will magnify any discomfort/niggles you might be able to get away with on shorter rides.
I don’t think you need to look for a “beginners” aerobar specifically, just find what’s comfortable for you.