I got 5thmetacarpal base hairline fracture, im using splint, my two fingers are tapped is it enough for in this frcture. Suggest me?

Cast or splint. "dealers choice" a splint lets you take it off and wash but complicance is often an issue even with the best intentions and it may take longer to heal. While annoying at times a cast may work faster initially. For some but nondisplaced fractures dont mandate casting always ten weeks down the line no difference, just your experience in getting there.
Fracture care. If it is truly a hairline fracture, which means an incomplete fracture, then yes. As long as you also refrain from any stressful activities with the hand. It will take approximately 6-8 weeks to heal under normal circumstances.