！！！！！！帮忙看下这样说可以吗！！！！！！！

not only can i learn more there, but also my vision will be broadened
主谓要一致
i 和my vision是两个独立主语
所以必须都放在连词后面
这样就不会句式杂糅了

I can not only learn more from there,but also broaden my vision..
前后都是I做主语比较好

把from there 也放后面吧~

I can not only learn more but also broaden my vision from there

改为
not only can i learn more there ,but also my vision will be broadened

Not only can I learn more there,but also my vision will be broadened

not only 。。。 but also句型
前句倒装，后句陈述