1. Log into your Lyrebird account.

2. Navigate to Settings > Subscription.

3. Click on 'Add payment method' or 'Upgrade to unlimited usage'.

4. Choose between a monthly or annual plan. The monthly plan is $300, while the annual plan is $2,400 (equivalent to $200 per month).

5. If you work part-time (under 25 hours/week), you can select the part-time option for a discounted rate of $150 monthly or $1,200 annually.

6. Proceed to checkout, and your subscription will be activated immediately.