There’s quite a bit of helpful information in this “Permits/visas/government” section of the forum so have a trawl through and see if anything fits.
Basically you will likely run into problems getting a permit to live, never mind work here as non-EU. An employer has to prove they can’t find a Swiss or EU person to do the job they have advertised and café / hair salon work just isn’t specialised enough for this condition.
As regards your boyfriend supporting you, here’s a link to a thread on a concubine permit.
Please read the information from the Swiss Government:
Work Permit Non-EU/EFTA (Specially read admission basis and procedure)
Also, for 'job' do they plan to pay you a proper living salary ?
Without 'real' qualifications, language skills and experience.....it will be extremely difficult to get a start in Switzerland....
Understand that a concubine permit requires your partner to be financially responsible for you for 5 years, even if you break up but still stay here.
However, staying here as a non-EU would be very difficult since any Swiss employer would have to prove they can’t find a Swiss/EU national who could do the job. Frankly it doesn’t sound as if you have the skills that would allow any employer to get a permit for you if you break up with your bf.