The first conditional is used when we talk about something that is likely to happen in the future. The main and most commonly used formula is If + Present Simple + Subject + Future Simple (Will).

The first conditional is used to express future plans, threats, warnings, promises or to convince someone about something.

That is, the first will be the future clause and the second will be the condition. Will + Subject + infinitive verb + If + Subject + verb in present simple + ?
In the In the negative form they can be used in two different ways:
Do and does.
Do is used with I, YOU, WE, THEY.
Does is used with HE, SHE, IT
It can also be used in the following forms: DON'T and DOESN'T.

Remember that after the "if" clause it is necessary to include a comma before the result clause.
Many times we think that the comma is not important in English but this time it will be an exception because the comma in this topic is important because it helps us to separate a sentence and to understand the sentence more.

That is, the first will be the future clause and the second will be the condition. Will + Subject + infinitive verb + If + Subject + verb in the present simple + ? Example: Will you buy me an ice cream if I clean my room?
The interrogative form helps us a lot because it changes the position of the sentence, since the first word is not the subject but the conditional if.