Capt. Obvious here.
Launching realistic craft requires precision, because the margins are small compared to sci-fi craft.
The most important thing is to launch into the correct plane. (RInc close to zero)
Secondly, you can use time instead fuel to reach the intercept point. Plan for small burns and use orbital mechanics to arrive without high closing rates.
If you don't want to do complex math or use advanced MFDs, you could practise using the Deltaglider to train your brain in the "weird" world of orbital mechanics. It can take some time (at least for me, it did), but you might enjoy it (I certainly did!!!).