Never cooked a baked dinner - any tips/advice before I have a go?

Suggestion... Place the joint of meat on a rack in the baking dish, put a half inch of water in the baking dish, cover the lot with foil... This keeps it moist and prevents it drying out... Plus the juices in the baking dish make a great gravy.... And slow cook on low for a few hours

If you are unused to this type of cooking, I suggest that you roast a chicken for your first attempt.
A chicken is less sensitive to accurate timing, whereas beef is easily overcooked. Also a joint of beef needs to be a large one to cook satisfactorily and you are only feeding one and a half !

When I cook a chicken, which I shall do tomorrow evening, I drape some streaky bacon over the breast to keep it moist - the breast cooks faster than the legs. I often insert chunks of lemon inside the carcass with some garden herbs - parsley, thyme or whatever is available.

Hope it goes well. Helping to cook is a wonderful way for children to spend time with adults.

Cook your potatoes around the joint of meat, season with salt and pepper then cover it with foil so it doesn't dry out, a little drop of water and cook slow, 25 minutes for every lb of meat. Add the meat juices to your gravy when cooked.

Carrots, parsnips, butternut squash are nice done in the air fryer with little drop of oil rubbed over them and some seasoning. They take about 25-30 minutes, just make sure you turn them away they are cooking.

Steam your veg, broccoli, cabbage etc 20 minutes before for you are ready to serve.

Chicken is pretty hard to mess up and is cheaper than lamb or roast beef for a first go.

Advice:
Pay attention to the timing and see if you can’t get everything hot at the right time which is at the finish.
Do all your prep the day before or in the morning for a late afternoon/ early evening meal.

The end minutes and serving will be the most stressful, so just remember that it’s only a single meal and there are far more important things going on in the world.

Enjoy the day and welcome your daughter to help out if she’s able.

It’s quality time.

Peace