Email & contact managing / tracking software

I run a very small online business and I'm looking for a better way to manage my contacts and the emails I send. I'm starting to contact people to discuss partnerships / marketing ideas and it's a bit difficult to keep track of everything. Currently, I do the tracking using an excel spreadsheet but it's far from being ideal.

I'm looking for an app / software / website that can help me with:
- creating a list of contacts with enough fields so I can save important info about each of them
- keep track of what emails I send to each contact and when emails were sent so it can remind me to send follow-ups after x days
- keep in memory some pre-written emails (so I dont have to copy past from a word document each time) that I can easily send

In addition, I must be able to connect my professional email address (hosted by my webhost) to the software to manage and send emails directly in it using my pro email.
Finally, if there is a way to easily import all my contacts from linkedin within the app, it's even better.

I've tried a few CRMs (hubspot, etc) but they tend to be overly complicated or they don't offer exactly what I'm looking for (and are sometimes very expensive). Are you aware of any software that could do the work?

Thanks