Madainn mhath Celtic Spice, Fàilte don fhòram.
Cha robh sin dona idir. It would be better to say - Chan eil mòran Gàidhlig agam - I don't have a lot of Gàidhlig. You could use glé mhath with something like Chan eil mo chuid Ghàidhlig glé mhath literally -(my share of gaelic isn't very good)- but that is a little more complicated perhaps for just now.
Anyway, welcome to the foram - have fun
