There are many types of Begonia. Do you have anything particular in mind?
I've been growing them from seed for a long time. Begonias from seed are not too difficult
but are not entry level. So be prepared for some disappointment as you climb the learning curve.
At the seedling stage they are more difficult than Cannabis. As adults, very easy.
It is worth the disappointment. The photo is Begonia 'Big'. This is an angel wing begonia grown from seed in 2018. Seed was started under lights about the first of April (I'm in USDA climate zone 7A). Transplanted out around June first. The big pot on the left contains three plants.
I'll be glad to answer any questions you have about begonias.