Glad you can still have hot drinks
@Annb!
I love talking about growing things so I don't need asking twice

I'm growing carrots in 12" round plastic pots that are about 12" deep - there are probably about 10 carrots in each pot. You can sow way more than that and eat the thinnings as they start to grow and crowd, the thinnings are lovely in salads. You get loads of seeds in a packet so it's not really a waste to eat them very small. They vary in size but are easily as big and clean as the ones in the supermarket. The variety I grow is Early Nantes, it's very sweet and crisp. I'm very happy with how they worked out so will carry on with that.
The swedes are in wider oval plastic pots that were my mum's flower pots, I think about 20 litre size. There are 3 swedes in each pot. I also have large round plastic pots that are 35. 40 and 50 litres for various things - they have brassicas in at the moment. I don't know if it's beginner's luck but the swedes and carrots I've grown are just in a different league to the ones in the shops for taste and texture.
Pots also work for beetroot, garlic and onions as well but they need a bit more thinning out and space to grow, so I'll use troughs or wider pots for those next time. Those all don't need much depth so troughs are ideal.
It's very easy to grow in pots because you can get a cheap garden table or two and grow them at a convenient height - this helps me tremendously. I also have two small raised beds for beans and peas, and I'll add a couple more next spring. I grew some lovely peas in a 35 litre pot a couple of years ago - they grew great up a little obelisk I got very cheap on Amazon.
I use just normal garden centre compost, it works out quite expensive but you can re-use spent compost by mixing it with a bit of new, and add some fertiliser (I'm starting to make my own compost but it takes a while!)
I hope you'll have a go and we can compare our crops! I think sometimes it looks like I don't have failures, but I do. I just don't let it put me off, and many things like carrots and peas are great for succession growing, so you can always start over if you lose some.