Turnips are white, swedes are orangey. Turnips have a much higher water content but are also a little stronger tasting. Swedes are sweeter and mash easier.
I like butternut squash (and all the other cucurbita - pumpkins etc). Far rather prep. something with a smooth skin than bloody bobbly-skinned pumpkins.
I quarter-ish them, scrape the seeds out with a teaspoon and roast them with the skin on. Peeling them once roasted is simple. Adds much more flavour to the dish too.
OH and I love cooking and have both worked in F&B (although neither proper chefs). The secrets are knowing where to cut corners without affecting the dish and also preparing first.
I love cooking and so does my partner. We batch cook or batch prepare the boring stuff to save time eg mashed or boiled potatoes, pasta sauce, pastry, bread dough, chicken stock, chicken portions (raw and roasted breasts / leg whole and chopped. We freeze leftovers as it's usually nicer to eat that meal a week later than to have the same dish twice (or more) in a row.
IME, enjoying cooking comes down to prep and being in a tidy kitchen before you begin the 'cooking' part. I love time to myself, radio on and a session in the kitchen.
Mise en place makes it all much more enjoyable. Open wine. Chop all veg then tidy. Prep all meat then tidy. Begin cooking.
Sharp knives. If you have a knife that can cut down through a butternut squash (or whatever else) in one go then life's much easier. Sounds contrary but you're less likely to cut yourself too.