Don't waste time doing full time job if you have intention to
quit.
Within the short 6 months to learn a skill and earn money at the
same time.
Can you think of a job that does that? Don't think of
sales/promoter/credit card seller type of bull job which foreigners
can easily replace you.
Still can't think of any?
For a start, get a car license. Have already? Get a forklift or
truck license. Don't want?
Think then.