Social media planning - Instagram and TikTok

A charity focussing on allergies, we're looking for someone to help in the short term with planning and creating social media content to increase activity and followers. I'm looking for someone to provide social media support in the following ways:
1. Develop a content plan for social media (instagram primarily, but where posts can be shared via twitter, facebook and LinkedIn). We will be able to provide information on upcoming events and releases. This should include specific posts/ discussions that will take place on set days and weeks.
2. Develop social media visuals/graphics. We have a bank of some that can be re-used, and can provide text/ stats in line with an agreed plan.
3. Assist in the setup of a TikTok account and advise on frequency of posting etc.
There will need to be a couple of calls to understand our aims, voice etc and a bit of pre-reading.
The focus is here is very much on a practical, immediately usable solution. The planning should be quick and can be refined as we go, the priority is to begin putting out more content as soon as possible.
Estimated that this will take around 4 days, with some up front and some spread out over a month, and have budgeted for £200 per day.
Proposals will need to include examples of where similar work has been carried out - particularly any mention of charities with a health focus. Accuracy of content is important.