you obviously already have a 'bike'. which you think is creating discomfort.
unless you have a wider tire bike and are extremely comfortable in winter conditions; why are you focused on another bike right now?
nothing good will come from it.
now's a good time to focus on self-improvement.
you have months ahead to create improvement.
you have ice skating and XC skiing in your area, if those are things of interest, they're highly compatible. They'll also highlight things which are body focused.
Bike size? is an internet guess from any of us.
Ride On
Yuri