Sure. Why not? If you can write a resume and interview for a full-time job then why not do the same for something short-term that ends/finishes with less risk for both parties…
My experience with Upwork is that the market is flooded with low quality providers from the third-world such that it's impossible to earn a living EU or US wage.
Yup, the same experience for me as well at least in what concerns the flood, not so sure about quality. This drags the prices down and I see many clients offering $5-$15/h for short-medium term jobs.