Since the ISP knows what sites I visit and they can assume or predict that I'm using Tor if they are monitoring my traffic, how can I distract them by making them see that I visit some particular site when I'm visiting some other site.
To put simply, say if I am browsing say Reddit, my ISP will instead see that I'm on security.stackexchange.com
You can not distract your ISP basically, there is no a human checking the traffic so he can be distracted. In general, ISP logs dns, ips, https and so on in the same way bro/snort/aiengine does. However there is some traffic generators that can make hard for an ISP to determine what you do, because basically you enter in 1000 sites every time. Have a look at https://github.com/ecapuano/web-traffic-generator for example, this may help you.
This is an active area of research that generally falls into the categories of censorship resistance and traffic obfuscation. Some approaches are pluggable transports in Tor, domain fronting, and decoy routing.
What can you use today? As far as I know Tor’s pluggable transports are the main usable implementation, but they have downsides as well.
