Crazy about football

I don't understand too ( much ) about football, but I will try. . In the first photo there are a few players trying to catch the ball. In the second photo the goalkeeper will save a possible goal. And in the third photo the referee pulled out the red card and sent off  the player (by) for the match.

Very well done. Descriptive and precise.

I don't understand too much about football, but I will try it. In the first photo there are a few players trying to get the ball. In the second photo the goalkeeper will save a possible goal. And in the third photo the referee pulled out the red card and sent off  to   a player.  by the match.

Good.  I don't understand much ...  OR   I don't understand too much,   both mean I understand little

to get the ball,  to catch  implies using hands

Many good corrections here.  Prepositions are confusing in English (by the match, in the match, for the match) and the preposition will change depending on the English of a particular country.  To send a player off (or send off a player) means to remove the player from the match.  ("from" is a preposition that safely follows the verb "remove" in almost every English-speaking country).  Therefore it might be safer to say "...pulled out the red card and removed the (or a) player from the match."