If your goal is to 'make skillset strong', then I assume your want to learn. It's hard for us to guess what your interests are, so the most straightforward advi

If your goal is to 'make skillset strong', then I assume your want to learn. It's hard for us to guess what your interests are, so the most straightforward advice would be to join an open-source project that uses the desired technologies (language, framework, etc.) and go from there. There's usually an issue-tracker and mailing list for the project to get some contact with other devs. Pick an issue that has attention and which you feel you can understand. Replicate it, then try to solve it. It's impossible __not__ to aquire new professional knowledge in such process. It's also ok, to drop it and try to find another project, perhaps, more up to your present skill level. The more you try, the more you'll learn...about yourself.