If you can make laragon run jar files like
Java -jar o your.jar
Then you could use it.
I don't know laragon but you would better keep it aside until you learn the basics of b4j, jserver, jdbc, connectionpools firstly.
After you have got ahold of those technologies you may have the recipe to use it with laragon. may be you wont even need it at the end.
There isn't any CRUD like phpmyadmin for mysql, you may need to create one yourself or look in the forum for jrdc2 and DButils (look for the mysql version)
Anyway. You may better keep your mind open when learning b4j as it is not like php at all.