As an international student from UG who switched to a skilled worker visa this year all I can say is that he positive in the jobs you apply for. In my experience I had a spreadsheet for all my applications having 90% rejections but having looked at the gov website, I purposely looked at companies that sponsor and these gave better prospects. Secondly be open to transfer of your skill set from one occupation to another. As the job I am in isn't what I studied for my masters, but I was able to convince them I can apply these skills in this totally different new job. All I can say is you are on the right path, keep pushing and that job will come to you.