You can teach yourself though.
Buy and read
cyclecraft.
It's defensive riding for cyclists. Some of it is plain sense, some a little more counterintuitive until you understand it.
Like riding further out to get more room from passing drivers - the idea being that they see you more as an obstacle to pass, than something to brush past.There are tips on tackling all sorts of junctions and hazards.
So, buy it (or see if you can get it from the library), read it, put it into practice and then re-read it occasionally - we all benefit from refreshing our knowledge every so often.The driver or cyclist who thinks they know it all and can stop learning is the biggest fool.