Being driven around the bend
I know what you mean as the others have mentioned it's a question of confidence 25 years off a bike is quite some time I suggest you need to start right back at the begining. Without wanting to teach my grandmother how to suck eggs I suggest you go back to the basics and:
1. Pick a corner or roundabout that gives good observation
2. Ensure you and the bike are warm ie warm tyres and good weather
3 Practice at a quite time ie sunday am
4. 2nd gear slowish in not under harsh braking
5 Look the way you want to travel
6 Do not coast around the corner
7 Move your body weight toward where you want to go
8 Drive around the corner
9 Exit a little quicker than you entered
10 Repeat the whole exercise again and again
Don't worry about leaning or steering the bike will go where you are looking, the more you think about steering the more tentative you will become just look where you want to go and slowly accelerate towards it.
Angle of lean - some peeps chuck a bike into a corner with abandon and always come out the otherside okay -how because the have planned the attack on the corner and allowed the bike to do it's thing they don't wrestle the bike around the corner the guide the bike using the throttle and body mass. It is a very diffrent technique from off road riding you would never dream of using a back brake only it is alway 60/40 (wet weather) or 80/20 on a road bike.