Is there any information which can be understand easily about lighting work? Thanks!
Everything you need to know about this can be found on
Lightning.Network. If you need more detailed and technical information, check the whitepaper which is also available on the website.
For now, we should wait until segwit be implemented and see how is it going after being used, whether segwit could make blockchain transactions better or not give a significant changes. If segwit could solve major problems of bitcoins regarding high fees and confirmation time that takes hours even days, then we don't have to agreed with segwit2x or Lightning networks. However, if segwit isn't enough for scale solution, then we should worry about chain split if core developers don't agree with it as they have stated to not support 2Mb hard fork.
Another chain split is very likely to happen but once again, I believe only one bitcoin will survive and the other will remain as an alt and die with time. We have already seen how bigger block size are bad, I don't understand why people still want to hard fork once again. Schnorr and SegWit are going to help, a bigger block size will make things worst.