The Jags' top scorer took his tally to an impressive six strikes from his first season in the Scottish top flight with the opener in the 1-1 draw at Hibs last time out.
But with Thistle having yet to post a victory on their hallowed Firhill turf, after seven league fixtures have yielded only four losses and three draws, Doolan knows there is no better time to fire his tally tomorrow.
Having already scored against St Johnstone in the 1-1 draw back on September 28, the Firhill frontman was in bullish mood as he assessed the Maryhill side's hopes of securing a win.
He said: "Our home form, or rather the results we've had at home, has been well documented but we are determined to get that first win.
"It would be great if we could achieve it against St Johnstone.
"On a personal note, given how hard we've found it to open our account at home, if I could get my seventh goal at Firhill tomorrow and help us to victory, it would take on an extra significance.
"Everyone knows in any league campaign your home form is vital and if we can just turn the corner then it would take a bit of pressure off us on the road.
"On top of that, with the festive card meaning that the games will be coming up thick and fast, then I think if we can get the win tomorrow then it would come at the right time.
"It would be the perfect springboard into the Christmas and New Year games that are so vital to shaping your season."
A modest individual, Doolan is the last man to sing his own praises.
When he first arrived at Firhill, from Junior giants Auchinleck Talbot almost four years ago, he was second in the strike pecking order to Liam Buchanan.
But even then, when game time was limited, Doolan's conversion rate in relation to the opportunities which came his way was the more impressive of the two.
Now being deployed in a loan striker's role often, it has meant that once again the 27-year-old's predatory instinct must be at it's sharpest when chances come his way.
If Doolan, as seems likely, does bust the double-figure strike barrier in his first term in the top tier, it would not only be a laudable achievement for the striker. but one which could play a key role in keeping Thistle out of the SPFL Premiership relegation play-offs.
But when it comes to righting the wrongs of seven home league games without enjoying the acclaim of those within the Jackie Husband stand, Doolan says there is a raw determination to finally put things right.
"There is no psychological problem about playing at home," he said.
"There is just a real determination to get that first win. We have dominated so many teams at Firhill without putting them away and it is very frustrating.
"But that has all been a real positive motivator this week.
"Plus although we were frustrated to get pegged back by Hibs late on at Easter Road, in retrospect that was still a decent point and a platform to take into this game with St Johnstone.
"It is high time we gave the fans the win they are desperate for at Firhill and no one is going to leave anything in the locker tomorrow trying to get it."