For the next few weeks, Shiro and hr older self-spent it trying to make themselves known in the community.
Her older self would grab a few part time jobs and enforce her persona as a timid woman who was on the weak side. However, her charm would make her a great addition to restaurants where she worked as a waitress.
During this time, she had also spent it teaching Shiro a few tips on her skills that she could use when he returns. Most of them don't need to rely on the system but she had taught her a few that she could use in tandem with the system.
The main tip that she taught her younger self was to ignore the mana cost of most items and try to get a feel of the skill herself. That was because the system dictates how much mana is needed for the skill's written effect to activate and takes it from her mana pool. If she could get a feel for the skill herself, she'll be able to control how much mana she wanted to use.