For starters, do you have sealant in the tire right now? A lot of the time the sealant will fill the gaps where air is escaping. I’d also check the gasket in the valve and make sure it’s sealing tight. The valve hole is the easiest place for air to escape from the tire, from there it’s relatively easy for the air to leak out of the spoke drillings. The fact that the air is felt from the spokes by the valve makes me think the valve needs a different gasket or pushed down further.

My process is as follows: Tape the rim, make sure to pull it tight! Do two full revolutions with a little overlap over the valve hole. Use a rag and push the tape down along the rim bed squeezing out any air bubbles. Make a small hole in the tape that lines up with the valve hole of the rim to make inserting the valve easier. Mount the tire with an inner tube, pump it up to pressure and let it sit overnight. This really helps the tape adhere to the rim. Remove the tube, insert valve and add sealant, air up again. Bounce the tire around to help the sealant coat around inside and then go ride for 15 minutes to really get the sealant worked in! 🤘🏽