Having solidarity coding skills would probably best for anyone who wants to boost up their blockchain career. It could land you a lot of projects including the existing ones and the new ones that are coming. I wanted to apply for a job on some projects too but the only skill I have is graphic, I'm not even very good at it. I don't see many crypto companies looking for these skills as they are just looking for freelancers for a short period of time.
I guess You meant Solidity instead of solidarity. Yes it's almost one of the best options actually to boost-up a blockchain career with ethereum and smart-contracts.
Programming skills in general are the most wanted in the blockchain field. So you can boost your skills in graphic design with crypto projects too. It would simply need to go with simple tasks before to know where exactly to start.
With blockchain development, i think it's not that easy to be skilled enough in few months time. And that's why i recommend those willing to get a quick start to go with other kinds of programming like those used in graphic design or web developement.