Bioinformatics jobs: is experience or education more desirable
This is really just repeat what @skymningen said in a comment.

When I was in your position I managed to secure a career development fellowship who specific purpose was to retrain lab postdocs to be bioinformaticians. It was a fantastic opportunity. But even then, this CDF involved very little class room education, and was mostly just about doing bioinformatics under the supervision of an expert. 

However, almost no one I now interview for bioinformatics positions has a formal bioinformatics education. I'm generally looking for experience and a demonstrated enthusiasm to learn new approaches in a rigorous, thoughtful and independent manner.

Thus I would definitely recommend experience over formal training. Perhaps with one caveat: you will need the basics of programming in R and probably a scripting language, so I might invest some time in online courses teaching the most basic elements of these languages. I might also be tempted to do an online course in the basics of RNA-seq analysis, so that you can run a basic reads -> alignments -> counts -> differential expression pipeline.  But these things shouldn't take you more than a week of evenings each, nothing like a MSc.