NoClip does not function correctly on later versions due to game mechanics changing, but there is a workaround to this with Freecam and ClickTP. Enable Freecam and ClickTP, then click to where you want to teleport through the wall. Once your player is on the other side disable Freecam. You may need to play around with the angles to find a way in.
On older versions, to use NoClip you must first trap yourself in a block such as sand, gravel, door, etc.
If SuperReach is unable to hit an entity from a certain angle, it could be due to an obstable in-between you and the entity. The mod works by sending packets to walk to the entity, so if you can't "walk" there, it might return an error. This could be a giant hole, water, a ledge higher than 2 blocks, trees, etc.