Share USB4G connection to eth0 port

I have been looking the past weeks on forums and YT videos about how to do what tittle says witout exist. I have a pc that only have a ethernet port and is configurated trought browser at the ip addres. So I need the raspberry to get internet from a 4G Usb dongle and give internet to the pc by the ethernet cable. This is mi ifconfig output:

pi@raspb:~ $ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.10.10.1 netmask 255.255.255.0 broadcast 10.10.10.255
ether dc:a6:32:f8:b6:c4 txqueuelen 1000 (Ethernet)
RX packets 225 bytes 13500 (13.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 14 bytes 1148 (1.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.100 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 fe80::e5db:be0d:34e8:be6c prefixlen 64 scopeid 0x20<link>
ether 00:a0:c6:00:00:00 txqueuelen 1000 (Ethernet)
RX packets 3803 bytes 132422 (129.3 KiB)
RX errors 3723 dropped 0 overruns 0 frame 3723
TX packets 310 bytes 50065 (48.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
loop txqueuelen 1000 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

This config

sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
sudo iptables -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
sudo iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT 

And this outputs:

 $ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         _gateway        0.0.0.0         UG    100    0        0 eth1
10.10.10.0      0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     100    0        0 eth1

$ sudo iptables -L -n -v
Chain INPUT (policy ACCEPT 1493 packets, 174K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 ACCEPT     all  --  eth1   eth0    0.0.0.0/0            0.0.0.0/0            state RELATED,ESTABLISHED
    0     0 ACCEPT     all  --  eth0   eth1    0.0.0.0/0            0.0.0.0/0

Chain OUTPUT (policy ACCEPT 1001 packets, 97740 bytes)
 pkts bytes target     prot opt in     out     source               destination

And sudo sysctl net.ipv4.ip_forward" returns 1