I don’t necessarily agree that all grain or biab is a “step up”. If you’re making beer you are happy with using extract then there is nothing wrong with that.
The upside of all grain is you do have more control over your final product. When you start with extract you are using concentrated sugars that somebody else extracted from whatever grain bill they used. When you start with all grain you have total control. Pound for pound, grain is cheaper than extract.
The downsides of all grain are first a longer brew day. Add at least 2.5 hours to your current extract brew day when you go to all grain. You have to measure and grind grain, heat mash water, mash usually for an hour, rinse your grain (sparge), runoff your wort, then clean out your mash tun and dispose of the grain. Second, you need more equipment. You need a grain mill to grind grain. You need a mash tun with the false bottom to mash and drain your grain, or a good bag and a large enough pot to do biab. You need a hydrometer to check your gravity pre-boil and post boil. Some other stuff. There is also a learning curve to all grain.
You stated you didn’t want it to turn into a job. All grain will definitely extend your brew day and give you more to do than extract.
It depends on what you want to do. If you are happy with the beer you are making with extract there is no reason to switch “just because”. If you are not happy with the beer you are making with extract and feel your beers are lacking then maybe you want to try grain.
There’s much to be said for kegging. I keg and I still bottle some, but not as much. I also feel my kegged beers are for the most part better than my bottled beers. I could be biased. More to go wrong with bottling.
The last thing I want to do is get into a debate between whether extract or all grain brewing is "better". It's a futile exercise because there is more to the hobby than just the beer in the glass and how to get there with the least effort possible. There are brewers who just want it easy. There are brewers who want it the hard way. There are brewers who will do whatever it takes to make the beer the absolute best it can be. Diverse goals. What makes something feel like a job to one person is a dream Saturday to another.
TLDR: The OP could clarify goals and we can all make recommendations to help achieve those.