Please post this in the general thread next time but it's fine for now.
Im not familiar with the strength of tennis in Ireland. If you have a vid of yourself playing tennis then I could give you more realistic advice. Top 100 in the US in 18&u is extremely tough and takes a ton of traveling and hard work. The top players in D1 tennis can usually go on to play professionally and have a fair amount of success in challengers & futures.