Much as in any sport, the same things would apply. Get fitter. Practice the skills. Play more matches. Improve your mental attitude. Build confidence.
Nas fheàrr
In Irish it's "níos fearr"
This could be better answered if it were used in a sentence.
It could be better translated if used in a sentence.
It would be Cara as in English.
Context is needed to translate properly. A sentence is better.
Is fearr duit bheith i d'aonar
Kerry have had more success in Gaelic Football than Mayo and have won most of their encounters, so Kerry would be regarded as being better than Mayo in Gaelic Football.
Paul Galvin, of Kerry.
Such a statement is open to debate. Different people will have different reasons as to why they prefer Gaelic Football or Soccer, so the question cannot really be answered definitively.
In Irish it's "Tá mé níos fearr ná tusa"
My blood. Mo chuid fola is better, however.