No help from me, just Croeso, Welcome and you will find all sorts of help here, some linguistic, some on using the Forum! To quote as I just did, you just highlight and click on the result. Unless you are using the app, in which case you need to ask someone else, as I am hopeless with that!
To be sure of getting someone’s attention you put @ before their Forum name and as you start to type, you’ll get offered a list of possibles and need to click on the one you want, like @henddraig or @f1sh3rman99 which I got as soon as I typed 1 after f!!!
“Really useful how to stuff..” is a useful topic, click here to see and use left arrow above to get back!
And yes you did start a new topic. Use the big Q above to search for topics but start new if nothing seems to fit!
Also, where are you? It would help you a lot to get chats in Welsh.