Very difficult to practice without a partner. These skills develop from hands on practice, developing a sense of when the lock or takedown becomes effective, and how body position, size/strength of opponent, and opponent's pain tolerance impact the particular lock. That being said, there are a few options for training the techniques available. While not optimal, some training is better than no training.
1. Use a training dummy: a product like Datu Worden's Silent fighter will allow you to work entries and "line up" techniques like armbar, cane takedow, compress elbow etc
2. Visualize the techniques as they can apply in kata. The Modern Arnis Anyo's are ripe with joint locking and throwing techniques. Slow your practice when a particular move allows for this type of interpretation, visualize the application of the technique and also visualize resistance/or complications. How would you deal with those issues
3. Practice the motions of the particular lock as a calestenic. Wally Jay's book of Small Circle Jujitsu may provide you with some ideas as to how that might look. The finish to a proper standing center lock, as one example, mimicks screwing a lightbulb into an overhead socket
4. Finally, trade beer, toilet cleaning, lawn cutting or whatever to a friend who doesn't train and get some live practice. There is no real substitute for an actual opponent. You might be surprised and actually get an ongoing training partner
5. Find a school closer to your home that does a different style. See if they are interested in learning some of the Art within their art and offer to train them for free, to your ability level (maybe offer to host a seminar if there is interest and bring in an instructor from your current school for a low cost seminar
Just a few thoughts