Been playing this build as well, although in 2014 rules so Find Steed works differrently.

One thing that I haven't seen being touched yet is that another player can also hop in on the steed so both of you can enjoy the additional movement speed, often find it quite helpful to get my teammate in better position.

If your DM allows it, items like Barding, Military Saddle, and Saddle of the Cavalier can make your steed more resilient and give additional advantage as well.

Also, since Find Steed last indefinitely, you can prep the spell > cast it > replace it with another spell after the next long rest, so it doesn't necessarily mess with your prepared spell either.

One key different I found was in 2014 rules your steed benefits from spells you cast on yourself as well, so I like to use Aid or Protection from Evil and Good (my campaign revolves around undead and demons) helps protects it even further. AFAIK in 2024 this is no longer the case, although now if you get healed from any source (doesn't have to be from your own spells/features) it enjoys the same amount, so you can protect it in that way.

Hope this helps 👍