Newbie and Tulips question

Newbie and Tulips question

I am new :) I am new at gardening too! My question is for tulips: How deep do you have to plant the bulbs? How far apart? Is it okay to have mulch by them? Can I order them online? Would you recommend a garden center first? Keep in mind I live in a cold weather state so there will be snow. Thank you I am very new at this--I have been an apartment dweller for awhile. I am just getting my bearings back after having a baby and now I am getting energy to try gardening. Thank you :)
strawberry escape artist!

strawberry escape artist!

Marigold seeds

Marigold seeds

Photos of the Garden…

Photos of the Garden…

Moy Grande Hibiscus

Moy Grande Hibiscus

Repotting gooseberry

Repotting gooseberry

Lily variety and lily pollen

Lily variety and lily pollen