In which case I would start with this set of Tutorials fro the Audacity Manual: Audacity Manual
particularly this one: Audacity Manual
and this workflow: Audacity Manual
And when I was conerting my LPs I found Brian Davies’ ClickRepair software invaluable. It costs a little but if you have a lot of LPs, as you have, it is well worth considering. See this sticky thread: Click/pop removal - ClickRepair software
WC