European countries are not in the business of letting in random foreigners that have no business being there permanently. You can certainly come to any of these countries as a tourist, but you can only stay there for up to 90 days and you won’t be able to get a bank account or rent a place long term.
A work visa is not something you just apply for yourself. You need to find an employer that is willing to incur the time and money in sponsoring your work visa instead of hiring one of the 400+ million EU citizens that already have the automatic right to work in these places.
Please also consider the legalities of such a move because unless you’re already an EU citizen, your plan is not doable.