I'm afraid you're going to be a bit disappointed. I did my risk assessment in the same way that most other parents did, and there really aren't a set of numbers out there that noone knows about already. We all weigh the potential benefits against the risk for harm. The main place that pro vaccine folks and vaccine hesitant folks part ways is on which set of numbers they find more believable.
Pro vaccine folks believe the numbers that show that although rare, death does occur from COVID-19 in folks that are currently eligible for vaccination. In addition to that, long COVID is a thing that does occur, though I don't know the rates of its occurrence in the youngest age ranges. It's been relatively common in somewhat older age ranges (
Attributes and predictors of long COVID | Nature Medicine), and I'm not aware of a reason to believe that it will be nonexistent in 20 year olds. Pro vaccine folks also tend to place less credence in data from systems like the VAERS, often because anyone can report an adverse result without evidence of a causal relationship.
Essentially the same argument gets made about COVID-19 mortality figures by vaccine hesitant folks. Vaccine hesitant folks tend to place more credence in the numbers from the VAERS and less in the numbers that are given to show risk.
In other words, we all look at the same numbers, but noone believes that all of the numbers are accurate. Our personal biases determine which set of numbers we favor.
One, more recent, finding that we need to keep an eye on is the finding of myocarditis in some kids following vaccination. The argument that often gets made is that because kids don't die from COVID, this is an unnecessary risk. However that's not the appropriate comparison. Myocarditis is a relatively frequent finding in young folks that have been infected with SARS-CoV-2 as well (
Prevalence of Clinical and Subclinical Myocarditis in Competitive Athletes With Recent SARS-CoV-2 Infection: Results From the Big Ten COVID-19 Cardiac Registry | Cardiology | JAMA Cardiology | JAMA Network). Data so far suggests that myocarditis is more frequent after infection than after vaccination. Therefore this is a reasonable risk in my opinion. Things may change as new data becomes available.