any other tips on how to practice those skills while I'm in training so I could use them in real life?
Repetition, repetition, repetition.
Experience breeds confidence and capability. On most Open Water courses, there is limited time for adequate repetition and reinforcement of individual skills. With that reality comes the need to accept that further practice and refinement is required post-qualification. Far too few dive educators stress that reality.
You might want to arrange some further access to a swimming pool, or shallow water environment, so that you and your husband can spend some quality time working to perfect and ingrain the skills that you have learned in training. Alternatively, or in addition, you can normally find time to practice specific skills during some phase of a scuba dive (for instance, on the safety stop). Make a habit of using those available moments to rehearse one, or more, skills that you learned on the Open Water course.
As you practice, take it in turns - one person practices a skill, whilst the other supervises. Make sure to stay well within your comfort zones, to ensure that you don't get stressed during the practice. You have plenty of time to progress slowly and comfortably - and it's better to reinforce a positive association with the skills rather than push things and develop a negative connection to those scenarios.
There's a lot of skill demonstration videos available to view on YouTube: access and review these as a reminder of the key functional points you need to perfect.
And secondly, have others had experiences with getting a little freaked out in training and getting back to a good comfort level? I was much more confident before I ran into a couple of things that were difficult for me!
It's quite common for students to experience some anxiety or stress with basic scuba skills; especially the mask remove/replace. Allow for the fact that Open Water training can be quite intensive, given that being underwater is a quite overwhelming situation for the brain to comprehend. If you felt anxiety at some point in training, then you are probably in the majority of divers. That's nothing to feel bad about.
In fact, you have one major benefit from encountering those fears at an early stage - namely, that you get a head-start with developing your psychological control to stress underwater. Those who find the training undemanding have no opportunity to develop any self-control against instinctive stress-driven responses. Panic is the biggest danger to divers underwater - you've experienced that... and have started formulating a resistance against it. Understand it for what it is... address it... and you'll be a much safer diver in the long-run.