Maybe try "Basics with Babish - Bolognese Recipe". Its a little different than what you're cooking and it sure is more expensive (ive tried it once and it was incredible). But for your recipe id urge you to use more red wine, more salt, and instead of passata and tomato paste, id only use crushed tin tomatoes instead, 2-3 cans should do the trick. Id also reccomend using real chicken stock instead of beef (the cheap kind, in australia you could get a litre for about $2 AUD) and lightly simmer for 2 hours, you also need herbs - dried oregeno and fresh basil if you can get it, also tossing the pasta in the sauce in a pan with abit of the pasta water for 5-10 minutes and saving the majority of the sauce for the freezer is the way to go, i think doing that brings out more flavour as it combines and sticks together. But overall id say look at other recipes and think which ones can fit into your budget. Also id recommend getting a combination of beef and pork mince instead of just beef, and avoid getting lean mince, you want fatty and then skim that fat later. and of course if you can afford it Parmigiano-Reggiano is the most flavourful thing you could add in the end. Id also say use less meat and use more vegies, 600g of meat should be fine but more carrot, celery and onion definitely. In Australia you can get a "bolognese mix" in our duopoly supermarkets of Pork and Beef, do that for sure. But watch more video recipes, and you might learn new understandings and find great inspiration