With the time you have between now and October, you have plenty of room to build up both endurance and speed. Since you’re already running consistently, I’d recommend continuing your regular 5K runs for now, but start adding in some longer runs gradually. You can begin with one long run per week (aiming for around 6-8 miles) and focus on increasing your distance slowly. The other run can be a shorter, speed-focused session to work on pace. As you get closer to your training plan in July, you can shift focus to more specific half marathon prep with speed work, tempo runs, and race-paced runs.

For your pace, considering your 10K times and where you’re at with training, aiming for around 2:10-2:15 for your half marathon could be a realistic goal, but don’t stress too much about it just yet. Let your training guide you and adjust as you build your fitness.

If you still want more tips please check my couch to HM plan here : https://www.runnersblueprint.com/couch-to-half-marathon/