You can’t always train at the gym.
Training in a state of the art gym or dojo is a great thing. There you’ll likely have space, time, equipment, partners at different levels, and coaching. But not being able to get to one for whatever reason (money, responsibilities, time, distance) should not stop you from training and even making progress on your own, at home.
If you don’t have a lot of stuff you can do calisthenics and bodyweight exercises (pushups situps, pull-ups, etc.) anywhere. There’s your cardio and strength straining.
You can shadow box in front of your shadow or a mirror. When you do, do several rounds, start slow and easy, and progressively add realism and intensity. I consider this a really important part of martial training; rehearsing your moves with intent and energy will bring them up with intent and energy. Practice at three speeds: 1. slow and mechanical, 2. Half speed and smoothly flowing, 3. Twitchy, super fast or “red line” speed.
Hit something regularly, a punching bag, a makiwara, a makeshift Item you can hang or post to practice both intentional hitting, and casual hitting, I mean hitting without preparation, no stance, no telegraph. Why? Because you may not always be in a position to do a perfect hit, but should do a hit anyway.
Visualize the techniques and try them with your eyes closed (in a safe space of course). Practice from different positions, standing, sitting, lying down. Try to train both under duress, when tired from cardio and strength, and when very relaxed.
Rest.Training under too much continual stress may burn you out, and actually make the practice less beneficial.
Train and practice under less than optimal conditions. I wear glasses. I train with and without glasses. A shooting instructor brought this home when he asked; if in the middle of the night I hear a break in at home and a rush to the bedroom door, can I just grab my gun, point, and shoot to 15 feet in the dark without bothering to look for my glasses? I can now, thanks to dry fire practice and taking off the prescriptions at the range. Sometimes, I may be sluggish from a cold/flu and medication. Yes, I’ve looked to see how effective I am in those conditions, what I can and can’t do, and how fast.
Research other methods beyond what you are taught at the local school. Some places just teach one thing, say Mesopotamian Kung Fu, that doesn’t mean you can’t train Jiu Jitsu for yourself on your own time, or a spin kick, or a particular kata. Who are you doing this for, the school/instructor, or yourself and your family?
Speaking of family, is there someone that might help you out A LITTLE BIT at home, If they’re not training for themselves they probably won’t want to be your training partner, but “help me work out this move for 5 minutes” might be feasible. Don’t hurt or aggravate them, and they might help you again.
I tell my students over and over, that they are taught in the gym but learn at home, and that everything is homework. This is what makes a martial art yours, and part of your lifestyle not just a “class” you take.