people either seem to love or hate them. i was brought up with one. i think the people who hate them have loads of time, are very enthusiastic and fussy cooks. for those of us who work all day they are a godsend, also good for feeding families who eat at different times.
you need a removeable pot. slow/high/auto settings. For family of 4-5 3.5 litres is good. i have a swan one which is over 20 years old. just buy something cheap.
recipes on here or you can buy books. Mainly i use standard recipes and then instead of adding stock i'll just add the cube and not the liquid.
curry is easy to start. tin of toms, onion, chutney, curry paste, meat, maybe apple/sultanas/old veg lurky in fridge. do not keep taking lid off, don't bother browning. root veg has to be chopped up and can take while to cook. get cheap cuts of meat.
or buy large lump of cheap beef and cook either by itself or with red wine or beer and onion, herbs, mustard. thicken with cornflour or gravy granules
pork shoulder and barbecue sauce is now a favourite in our house - thanks to threads here. i cook mine in stock (discard at end as fatty) and then cut meat at end and add shop bought barbecue sauce.
you can prep night before if easier.