TOkyo to gotemba and lake kawaguchiko

Hi

I will have mu trip to Japan on jan 2018, i have plan to go to gotemba and lake kawaguchiko from tokyo amd spend 1 night nearby, could pls advice which route is the best from tokyo to lake kawaguchiko first then spend the night at gotemba or to gotemba first then stay nearby lake kawaguchiko? And what train should i take?
Looking forward to your reply
Thanks

Jane