The pine trees don’t necessarily indicate acidic soil. I would just work in some good, organic nutrients like manure, alfalfa meal, blood/bone meal, humid acid, and azomite or other mineral rock combos like zeolite.
Check your water’s ph and skip the ground. When you water it will change it anyhow and with enough organic matter you can overcome clay while changing the ph. Ideally you can target plants with a 6-7 ph, which is where almost every fruit/vegetable thrives.
Keep the food out of shade unless it can get at least 6-8 hours direct light. Flowers or other plants may love it though.