Dumbbell routine?

I lost 50+ pounds on the keto diet. I bought an exercise bike that I’ve been using while watching Netflix or playing games. I decided to expand my make shift home gym...

So I ordered some dumbbells that I can adjust the weight (up to 100 for each one in the pair). They should be here shortly, but I don’t have a plan in place on how to use them.

I am a beginner when it comes to weight lifting. Any good resources to point me to? I would love a day by day routine to follow.

I was thinking alternating bike days and weight days. I can dedicate 1.5 hours if need be to each weight day.