Lapins is a pretty good self fertile cherry. It should get enough chilling in Dallas. I'd get it on Gisela 5 rootstock. Mine on Krymsk 5 all died of bacterial canker. Cherry isn't something to root a cutting, ie, self rooted. Even if you could root it, questionable, the tree would be too big and take years longer to fruit.
That said there is no place in TX that is good sweet cherry country. In Amarillo I made a crop about 6 years in 12 growing Stella. The fruit was mediocre at best. Now in Alpine in SW Texas I spent 6 years and nearly a $1,000 before cutting down 24 trees outdoors. All the trees on Krymsk 5 died and even the shelter I built didn't get them through the freezes.
It took 8 years to learn how to grow them in my greenhouse. They are the easiest fruit to sweeten up but the hardest to grow. I prefer figs, Strawberry Verte, apricot, and nectarine over sweet cherry.