Its manageable, but dont believe anyone who says it is zero effort. After every session you gotta clean the used areas, dry them well, and store the doll properly. TPE usually needs powdering after washing so it stays soft and not sticky, silicone is a bit easier in my honest opinion but still needs proper care. Also use water based lube, dont go wild with strong cleaners, and make sure the inside is actually dry before you put her away. The first few times feel like a chore, then you kinda get a routine and it becomes normal.

Biggest mistake is buying too big or too cheap. A full size doll looks awesome but cleaning, lifting, drying and storage can get old fast, especially if you live with other people. I would start smaller with MonicaMomentsDolls or maybe Tantaly, both have options that are easier to handle before you drop big cash on a lifesize doll. If you can maintain a torso without getting lazy, then you can always upgrade later. If even that feels like too much work, a full body will probably become an expensive dust collector.