Hello! Welcome.... You have joined an excellent site for info. I m a relative newbie too, and so hope some experienced members jump in here but I ll get ya started
First , start a thread with your most pressing issue as the subject.
For now tho, what type of test kit do you have?
Before you move the fish, make sure the new tank is cycled.
Also, goldfish like cooler temps (lower 70 s) & most loaches are considered tropical & like higher temps (78-80).
Just cruise this site, use search & absorb as much info as possible. We ll help ya ....