Competitive Planet (https://www.youtube.com/channel/UCQiPd5ivfEoGiLitHrh2PXA)
You can subscribe to this channel. Competitive Planet have started the online coaching through YouTube. I have gone through the Constitution lessons. Its good. While contacting the admin, they said they are going to upload the classes daily.
https://youtu.be/nWbLVrOMPbs
You know the syllabus of SSC Chsl and focus on the basics and practice as much as you can. Learn the formulas very religiously and make a handbook of important formulas to be helpful for the revision.The most challenging section in the CHSL exam is English section ..English grammar rules must be learnt and practiced.