There’s a few ways to start, but consider a triangle, price, quality, practicality. Dobsonians are in the middle of price and quality, less practical (tend to be large, need more fiddly work to get them sighted in and focused). Newtonians are in between quality and practicality, tend to be more expensive for the same capability of the dobsonians. If you swing high on price you can get the best of everything (either in dobsonians or newtonians).
Orion is a great brand, I’ve got one of these (the 10″):
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It’s tall, about 5′ when vertically oriented. Can easily see jupiter’s moons, and saturn’s rings, with virtually zero work involved.
Note that if you want one with tracking, or auto-find functionality, you’re getting into the thousands of dollars, easily.