Sunny,
Noodles made a good point, know you limits and your ability to control the safety.
I've been around birds most of my life. I never considered having a veterinarian trim nails. Since Meisha goes to work with me, she is physically on me – a lot. For me the wait is impractical. We perform it as needed. In Meisha's first visit, the vet retracted his offering out of concern for negative impact it could have on the positive established process. It is likely less stressful on her with us performing the task than a stranger.
You reflected that a veterinarian isn't a viable option in your situation. With clipping it's a hit or miss. I recommend exploring the fingernail file option. With Meisha she approached us up front wanting a manicure, holding her talon out.
You might consider sitting with your bird and file your own nails. Fake it if you needed to draw out your illustration of the procedure. Gauge your birds response for any observation. Start with simple movement across the birds nail without clasping it, to start the familiarity. Talk to the bird in a pleasant tone. If it is possible, start with a long toe, clasping the toe with your index finger and thumb where the nail starts. Gently file to round off. Release as when the bird pulls back. Continue talking the the bird calmly. Tap the toe and look into the eyes to resume. The build on it. Consider returning to filing your own nails for a break in the process.