Tips on F chord.
# 1
Like this..
||--1--|-----|-----|-----|
||--1--|-----|-----|-----|
||-----|--2--|-----|-----|
||-----|-----|--3--|-----|
||--X--|-----|-----|-----|
||--X--|-----|-----|-----|
(Only play the top (highest in pitch) 4 strings)
or.. like this..
||--1--|-----|-----|-----|
||--1--|-----|-----|-----|
||-----|--2--|-----|-----|
||-----|-----|--3--|-----|
||-----|-----|-----|-----|
||--T--|-----|-----|-----|
(The T is your THUMB.. curl it over the top of fret board)
or like this..
||--1--|-----|-----|-----|
||--1--|-----|-----|-----|
||-----|--2--|-----|-----|
||-----|-----|--4--|-----|
||-----|-----|--3--|-----|
||--1--|-----|-----|-----|
(This is a standard barr chord)
# 2
Try playing the same shape, but up the neck a few frets where it's easier to play. Gradually, you'll gain some strength and you'll be able to nail it. Don't give up!
# 3