If you want to earn quick xp in Pokemon GO you should use the friend bonus. For each friend which you add and where you reach the friend level 1 (by sending him a present) you receive 1500 xp and with lucky egg even 3000 xp.
Another plus is the items you can receive by friends daily and you can have 200 friends but there is a present limit of 20 each day.
I would like to exchange some present with you every day.
Just add the other and me ingame:
4662 4531 4621 Germany
4814 7202 8396
2852 8266 6970 Germany
0623 1198 1816
9247 5971 9447
0394 7764 4800
3581 3668 2207 Germany
7783 6385 8345
1440 3257 4647 Germany
5224 6267 9241
9583 3763 5377 Germany
4333 1127 6109 Belgium
6491 4846 8850 Germany
1091 8885 8610 Germany
3918 0440 5958 Germany
5134 8439 0220
0745 8569 4456 Germany
7962 8566 7582
6229 5780 8557
5090 7860 2973 Germany
8343 3225 7725
5334 5447 6507
0182 5211 1108 Belgium
2231 9311 5432 Belgium
2572 8972 2502 denmark
4382 0001 1180 Spain
8110 1021 5157 Austria
4020 2907 3027 Germany
1440 3257 4647 Germany
Happy XP-Farming!