Tutorial: interplanetary warp

How to transfer to another planet using (Alcubierre) Warp Drive (Interstellar Mod) without expending a lot of dV on velocity changes.

Step 1. Equip Alcubierre drive and exit atmosphere.

Step 2. Calculate a velocity vector change-vector or dV-vector that is needed to match velocities with target planet using simple vector calculation (or just visually)

Step 3. Warp close to a point, that is near a dV vector and near central star

Step 4. Wait for the gravity of the central star to change your initial velocity vector, into desired (final) velocity vector.

Step 5. Warp to target planet, and fine tune orbit as required

NOTES:
If you have MechJeb 2 installed, to find the dV vector near the central star, you can use maneuver planner. Select match velocities with target after 0 sec. That will give the entire dV (vector) in terms of a maneuver node. Now position yourself using warp drive so, that the maneuver node is pointing directrly towards the central star (i.e. the bottom-most part of the nav-ball)
The closer you are to the central star, the harder will the gravitational pull be meaning the dV will happen in a shorter time. But if you are too close then.. well you know.