First attempt this weekend - any tips??

Salanna
My wife and I have been tracking my cycle, and we decided to try our first at home insemination this weekend. Does anyone have any tips? 
We bought a large syringe, sample cups for the semen, soft cups, pre-seed, and a big pack of ovulation and pregnancy tests. 
The plan is to get the sample from her brother in law, use the pre-seed, then do the insemination, put the soft cup in, and have an orgasm via vibrator.