First thing I'd do is get an OBD tool and check for any DTCs - cars are pretty good at self-diagnosis nowadays.
If no clues there, I'd clean the MAFs. Easy job for even a beginner. Only tool required is a screwdriver. Remove MAFs, spray down with cleaner, let dry, replace. Takes about five minutes per MAF.
If no improvement after cleaning MAFs, I'd clean the TBs. More complicated than cleaning the MAFs but not all that difficult.
Not sure what I'd try after all that.
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