French manicure looks great but getting it done professionally is not always the most practical (and economic) way. There’s nothing better than doing it at home. After all, why pay for a manicure when you can do it yourself!
When giving yourself a French manicure, place adhesive tape under the white tip of your nail (so the tape will cover the entire area under the tip). Then place the white nail polish to the uncovered tip. Using the tape will give a straight square look. Once the white polish dries, remove the tape and apply a coat of the transparent or pale-pink polish over the entire nail to complete the look. I do that and they look professionally done. Using adhesive tape is a lot cheaper than getting it done professionally or buying the kit. It’s also quite simple!
I got the tape idea from a friend of mine who’s obsessed with french maicure 
If your nails are not super long, try cutting the adhesive tape so that instead of a staight line you have a more cesent shape. It’s a bit more work and you need a master copy to work from to make sure all tape pieces are cuved at the same angle, but it will make your hand look much softer and fingertips less square (which tends to happen with shorter nails).