Talk Welsh

is this correct? (talk about party)
1:Bore da.
2:Bore da, fi sy’n cynnal parti i Sain. Hoffwn chi ddod?
1: Pryd mae’r parti?
2:Mae parti yn a nos wener.
1:Hoffwn i ddod i’r parti. Pwy arall sy’n mynd i’r parti?
2:Caitlin a Dieno.
1:Iawn. Am faint o’r gloch mae’r parti?
2: 7 o’r gloch tan 9.
1:Ble mae’r parti?
2:Yn fy ty. Sut wyt ti’n [...]

I want to learn a new language I already know welsh english and a tad of french,Id like to learn either german or spanish or a language like that help
ps I’m 13