I think that's a good idea, I'd go with a different strain of yeast (the one you used is notoriously difficult, even people who've been doing this for decades have had it fail on them) and since you're already at 7% or so ABV, you're going to want to acclimatize the yeast and use one of the tougher to kill varieties.
The good news is you don't have super high sugar content or very high alcohol content right now, which means this should be a fairly painless mead to re-start.
I'd recommend using a dried yeast (rather than liquid) such as the Lalvin brand for this as they start off with a far higher living cell count. They make a HUGE variety of yeasts, frankly almost any of them would be good choices.
Then rehydrate the yeast properly according to the instructions on the package (using goferm if you have it and just water if you don't), and you're going to want to acclimatize the yeast because they're not going to be used to any alcohol content at this stage in their lives.
There are extensive processes for how to do this described around these forums, but I think that since your alcohol content is so low you might be able to get away with a simpler process: rehydrate the yeast, after 15 minutes add to the rehydrated yeast a small amount of honey (very small, short squirt will do, or even just a tsp of table sugar, something to feed them), stir it up and wait 15 more minutes. Then add a small amount of your mead to the rehydration container... wait 10-15 minutes... repeat... repeat, as many times as you feel happy about doing. Then pitch it into your mead. Make sure to aerate the mead well by agressive stirring or whatever method you have, you'll want some O2 in there to help the yeast out.
That is my lazy-person method to acclimatizing the yeast for this situation, others may dissagree with my lazy technique for that, but I think this is a very non-severe case of trying to restart a mead and for a beginner I think a simpler and faster acclimatization is best.