I am going into my 2nd year as a co-angler. I went in with a little different attitude in my first year. Some tidbits from my 1st year which might help.
#1 - You are not a proven co-angler yet. You are new to the members of the league and thus have no "street cred" yet. Even if they like you they will trust their spots before trusting someone they don't know. In my league there are members who have been in the league as long as I have been alive. I was born in 1974 so then have been fishing these waters competitively for over 30 years in some cases.
#2 - If you know a "spot" talk to the angler prior to the tournament and discuss it. Explain the spot, why it's so good and prove you did your homework. If you have the opportunity to pre fish and show it to him even better. Boaters are generally not adverse to trying something out if they don't feel like it's being thrown on them in the midst of the actual tournament. As someone else mentioned they are not going to leave fish is his spot was producing. Even after talking about it there is no guarantee you are going there if his spot is producing.
#3 - Be prepared for anything!!! People laugh at the amount of stuff (variety) I have in my tacklebox. I can cover almost any condition I could imagine from that box. When I know the conditions I am being faced with for that moment I adapt and do my best to fish "my waters". A prime example is what happened at my 1st few tournament this year ...
Here comes the story ...
I was paired up with a boater fishing Rouses Point in 2012 (last year). The conditions we were facing I was NOT prepared for. I did my best but could only muster 3 fish out of that day. My boater cleaned house and got his limit and then some. I learned from that event and as luck would have it I was paired up with him again this year on the same body of water. Not only did I catch my limit but I outfished my boater. We had a HUGE laugh about it because he remembered last year and saw that I had learned to adapt BIG TIME.
Humbling sport because on the very next day I fished a completely different place (different boater) and could only catch 3 fish in a full day fishing. I did not know how to truly handle these new conditions. After some research (and numerous posts on this forum) It turns out that I had the stuff in my tacklebox but lacked the experience to recognize them as viable options under the conditions.
I went on to fish my next tournament on Chautauqua and was faced with similar conditions. Guess what. I reacted much better, got my limit and was proud to have adjusted accordingly.
Long winded way to say ... be prepared for anything ...
keep a positive attitude ,,,
and fish the conditions you are dealt.
You will be a better angler for it in the long run.
Good luck buddy!