If you are novice about the online training then you can enroll for educba website for online courses. Multiple courses are there & with comprehensive explanation about each topics which is a good thing. I dont know about the certification how much it will help me for the courses which I learnt & got certificate for but yes knowledge is useful, new techniques & practical examples are used.
For once I can say you can take this training as they are not at all costly too which will hurt your pocket.