It's next to impossible to get a job offer as a foreign worker. You would need to find an employer who is willing to give you a full time job offer and who is also willing to get an approved LMIA. The vast majority of employers are not willing to go through the LMIA process. If you want to look for jobs, you'll need to apply for them through sites such as linkedin and indeed.
You should find a different way to increase your points for Express Entry.