Übersetzung - Hebräisch-Englisch - קדימה, תחזיק את הראש שלך גבוה למעלה

Maybe say "go forward" instead of "go ahead".

Thanks... I'm afraid I didn't really understand the original text.

You did very well for someone who doesn't understand Hebrew...

can it be:

come on hold your head up high???

It could, if you're going for an everyday language version. The translation Cacue23 gave is a bit more poetic, like a saying or proverb. It really depends on the context, like the difference between a motto for a tattoo and a text message.

Its for a tattoo..

so it can be: come on hold your head up high?