If you're looking to gain some more experience in athletics there's a number of competitions you can do between now and September. I highly recommend that you try these competitions to go and do new events or to record a new PB in your favourite one. You will, of course, need to enter the events yourself and bear in mind that the entries will close before the event takes place, there are no entries on the night:
Grangemouth Open Graded - 3rd July (entries close on Saturday)
http://www.online-entries.co.uk
Livingston Open Graded Meeting - 17th July
https://www.livingstonac.com
Glasgow Athletics Association Miler Meet - 26th July
http://events.scottishathletics.org.uk/events/21439-18102-gaa-miler-meet
Ayrshire Track and Field Championships - Sunday, July 28th
http://www.online-entries.co.uk
Scottish National u13/u15/u20 Championships - 10th & 11th August -Grangemouth
http://events.scottishathletics.org.uk/events/21019-18117-fpsg-scottishathletics-national-u13u15u20-championships-and-11th-august
Shettleston Harriers Open Graded Meeting (1)- Crownpoint - Tuesday 20th August
https://register.primoevents.com/ps/event/ShettlestonHarriersOpenGradedMeeting2019
Livingston Open Graded Meeting - Wednesday 21st August
https://www.livingstonac.com
Shettleston Harriers Open Graded Meeting (2)- Crownpoint - Tuesday 207h August
https://register.primoevents.com/ps/event/ShettlestonHarriersOpenGradedMeeting
Grangemouth Open Graded - 4th September
http://www.online-entries.co.uk
Lanarkshire Amateur Athletics Association Champs - 8th September
https://www.q-buster.co.uk/laaa-track-field-championships-2019
Good Luck!