My opinion is that changing VISA type is not impossible maybe even not difficult.
The reason I say this is, I have a 90 day VISA and just communicated with a company needing English teachers. They noted if I’m in the country on any type of VISA they can take care of changing it. They do not work with people who do not already have VISA and not already in the country.
Might not apply to all VISA types.
I’m hear now almost 3 weeks and you just have to really studying the system, review posts for various insights and look to local resources for opinions, insights and help.
Oh yes, the virtual address. A virtual address is way to maintain an address in a place with without physically being there. It’s like planting a flag, in a place so people can still send you stuff but you don’t have to be there.