Welcome Taisapu,
Here are a few things I would recommend:
As a lower level player with little adena, you want to refrain from buying consumables as much as you can, so that you can save your adena for a weapon and armor.
Instead of fishing to buff yourself, instead sell the fish or the xp stews in giran for extra money. If you are able to leave your computer on to fish either while at work, or overnight, or both that will increase your passive income. If you were to do this with 4-5 accounts, you could earn enough adena for a c grade weapon in a week or two.
For buffs, I would recommend starting a new character as a buffer and leveling that character until you reach the level of your other character, then box the two so your main will always have buffs.
Progress may be slow, but it is definitely possible