Hi Jorge,
I would recommend the latest stable version of grails
3.3.10
I don't think there is any point using older versions
Grails 3 is built on top of gradle and springboot.
Grails 4 is going to be released soon which uses micronaut instead of some spring components so that will be a bigger transition I think.
I haven't heard of the burning-image:0.5.0 plugin
all the rest have more modern equivalents.
Might be worth asking about your proposed migration on the grails community slack channel.
I don't know what IDE you're using.
I highly recommend IntelliJ Ultimate for grails.
Regards,
Daniel Leahy.