Beatha agus sláinte, a Antaine, a chara,
Yes, thankfully, there are only 11 irregular verbs in modern Irish so, you don't have to worry about any more than that.
Niall Ó Domhnaill's FOCLÓIR GAEILGE-BÉARLA will list most of the regular verbs in current usage but, apart from the library of the Royal Irish Academy, I don't think there is any book which lists them all. You would have to include Middle Irish and Old Irish to get a complete list.
NEW IRISH GRAMMAR, by the Christian Brothers, has all the rules of grammar you'll ever need and it's explanations are in English.
The verb has four moods, Imperative, Indicative, Conditional and Subjunctive. the Imperative has one tense- present. The Indicative has five- present, habitual present,past, habitual past and future. The Subjunctive has two- past and present. The Conditional has past, present and future.
You can get a lot of information at this website: http://www.cumasc.ie/eolai.html
Don't worry about the dialects, the basic grammar and vocabulary is the same, just pick the one that's easiest on the ear for you to learn.
Tá súil agam go gcabhraíonn sé sin leat, a chara.
Go n-éirí an saol agus an aimsir leat,
Is mise, le gach meas,
Éadbhárd Ó Dubhshláine/Edward Delany
Baile Átha Cliath, Éire.