Sounds like a good plan. Just know that you will do less in the winter months. Don’t bust a gut trying to reach what you think you need in Jan/Feb as you will definitely do more and more easily in the spring/summer. You’ll have to wait for that game you really want and you might save money as it’ll be cheaper by then!

A target of around 1000 miles in a year is pretty decent. A lot of regular cyclists won’t get near that in a year.

Note that you should set an on-road rule. Turbo trainers and exercise bikes do not count towards annual mileages 🙂

Find your nearest CTC club and think about joining some of their rides too. That can get you out and about and discover new routes. Cycling fitness can improve very rapidly.