Any recs for transferring a solo 401k from Ascensus that uses Vanguard's 2065 target retirement fund? What should I know?

I am self employed. I have a 401k I opened with Vanguard and I have everything in their 2065 target retirement account. The account got rolled over into Ascensus. I discovered on a call just now with Ascensus that my fees will be increasing to over 100 a year. Coupled with how much I hate the interface, and I wanna transfer my 401k someone else.

Ideally, I'd keep it with the Vanguard 2065 target but I know nothing about this so please any information would be great.

1 - Who should I choose? Ascensus told me it was an easy process with anyone but Fidelity.

2 - Would I want to stay with Vanguard's fund or if I'm switching to say Schwab should I just use their target fund?

3 - Anything else to know? I feel like this is all unknowns unknowns for me.

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