The First Conditional:
(if + present simple, ... will + infinitive)
If it rains tomorrow, we'll go to the cinema.
The Second Conditional:
(if + past simple, ... would + infinitive)
If I had a lot of money, I would travel around the world.
http://www.studypro.eu/english-grammar/1st-and-2nd-conditionals.html
https://www.test-english.com/grammar-points/b1/first-and-second-conditionals/