How will you pay your way whilst you are here?
Although you will find a job
a) it can take a lot of time
b) your salary won't be that much
c) it is fairly expensive here

you would save a lot of money by applying for jobs from where you are

the employers here will know you are desperate if you are on a visit visa so you won't be able to negotiate such a high salary and benefits

there are often cases of people who come here and then end up in debt without enough money to get home.